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TheGeneIndustry Majorcompaniesarealreadyinpursuitofcommercialapplicationsofthenewbiology.Theydreamofplacingenzymesintheautomobiletomonitorexhaustandsenddataonpollutiontoamicroprocessorthatwillthenadjusttheengine.TheyspeakofwhattheNewYorkTimescallsmetal—hungrymicrobesthatmightbeusedtominevaluabletracemetalsfromoceanwater.Theyhavealreadydemandedandwontherighttopatentnewlifeforms. Nervouscriticsincludingmanyscientistsworrythatthereiscorporatenationalinternationalandinter-scientificrivalryintheentirebiotechnologicalfield.Theycreateimagesnotofoilspillsbutofmicrobespillsthatcouldspreaddiseaseanddestroyentirepopulations.Thecreationandaccidentalreleaseofextremelypoisonousmicrobeshoweverisonlyonecauseforalarm.Completelyrationalandrespectablescientistsaretalkingaboutpossibilitiesthatstaggertheimagination. Shouldwebreedpeoplewithcow-likestomachssotheycandigestgrassandhaytherebyrelievingthefoodproblembymodifyingustoeatlowerdownonthefoodchain?Shouldwebiologicallyalterworkerstofitthejobrequirementforexamplecreatingpilotswithfasterreactiontimesorassembly-lineworkersdesignedtodoourmonotonousworkforus?Shouldweattempttoeliminateinferiorpeopleandbreedasuper-race?Hitlertriedthisbutwithoutthegeneticweaponrythatmaysoonissuefromourlaboratories.Shouldweproducesoldierstodoourfighting?Shouldweusegeneticforecastingtopre-eliminateunfitbabies?Shouldwegrowreserveorgansforourselveseachofushavingasitwereasavingsbankfullofsparekidneyliversorhands? Wildasthesenotionsmaysoundeveryonehasitsadvocatesandopposersinthescientificcommunityaswellasitsstrikingcommercialapplication.AstwocriticsofgeneticengineeringJeremyRifkinandTedHowardstateintheirbookWhoShouldPlayGod?BroadScalegeneticengineeringwillprobablybeintroducedtoAmericamuchthesamewayasassemblylinesautomobilesvaccinescomputersandalltheothertechnologies.Aseachnewgeneticadvancebecomescommerciallypracticalanewconsumerneedwillbeexploitedandamarketforthenewtechnologywillbecreated. Accordingtothepassagewhichofthefollowingwouldworrythecriticsthemost?
Thereislesscrimenow;itseemsthatthereisafallinthecrimerate.
NewTechniquePromisesEarlierCancerDetection AnewtechniquecouldrevolutionizetheearlydetectionofcancergivingsufferersagreaterchanceofbeatingthediseaseAmericanscientistssaid.ResearchersattheMassachusettsInstituteofTechnologyhavedevisedanovelmethodof【51】changesinthenucleusofcellsintheearlieststagesofthedisease.Morethan85percentofallcancersoriginateintheepithelium上皮thatlinestheinternalsurfacesoforgans【52】thebody.Althoughthesearetreatable【53】theyarediagnosedinoneofthepreventablestagesearlybodydamagesarealmost【54】todetectsaidscientistFeld.Wepresentanewoptical-probe光学探子techniquebasedonlight-scatteringspectroscopy分光镜检查thatisable【55】detectprecancerousandearlycancerouscellsincell-richepitheliaheaddedinastatement. Thenewtechniquereliesonthefact【56】cellnucleichangeintheearlystagesofcancerandthedifferencesscatterlightinacharacteristicway.Untilnowthechangeswereonlydetectable【57】abiopsy活检wastakenthescientistssaid.Thenewtechnique【58】inthesciencejournalNaturecanbeusedinconjunctionwitharoutinecancerscreeningandsurveillancetechniquewhichusesanendoscope内窥镜—aflexibleopticalprobe【59】withcameraswhichisinsertedintoacavityinthebody—tocheck【60】cancers. Thescientistssaidthey【61】theirnewtechniqueinfourdifferentorgansduringroutineendoscopiccancerscreening.Thetipoftheopticalprobewasbroughtintocontactwiththetissuetobetestedandthescatteringoflightwasrecordedwithouttheneedforanytissuetobe【62】thescientistssaid.Ourresultsshowthatlight-scatteringspectroscopyhasthepotentialtodetectpre-cancerousbodydamagesandpreinvasivecancersthroughoutthebody.Thistechniqueshould【63】improvetheefficiencyofcancerscreeningandsurveillancethescientistssaid.Cancerisoneofthebiggest【64】inindustrializedcountries.【65】tofiguresfromtheWorldHealthOrganization10millionpeoplewerediagnosedwiththediseaseworldwidein1997andsixmilliondied.
StressLevelTiedtoEducationLevel PeoplewithlesseducationsufferfewerstressfuldaysaccordingtoareportinthecurrentissueoftheJournalofHealthandSocialBehavior. Howeverthestudyalsofoundthatwhenless-educatedpeopledidsufferstressitwasmoresevereandhadalargerimpactontheirhealth. Fromthisresearchershaveconcludedthattheday-to-dayfactorsthatcausestressarenotrandom.Whereyouareinsocietydeterminesthekindsofproblemsthatyouhaveeachdayandhowwellyouwillcopewiththem. Theresearchteaminterviewedanationalsampleof1031adultsdailyforeightdaysabouttheirstresslevelandhealth.Peoplewithoutahighschooldiplomareportedstresson30percentofthestudydayspeoplewithahighschooldegreereportedstress38percentofthetimeandpeoplewithcollegedegreesreportedstress44percentofthetime. Lessadvantagedpeoplearelesshealthyonadailybasisandaremorelikelytohavedownwardturnsintheirhealth.leadresearcherDr.JosephGrzywaczofWakeForestUniversityBaptistMedicalCentersaidinapreparedstatement.Thedownwardturnsinhealthwereconnectedwithdailystressorsandtheeffectofdailystressorsontheirhealthismuchmoredevastatingforthelessadvantaged. Grzywaczsuggestedfollow-upresearchtodeterminewhyless-educatedpeoplereportfewerdaysofstresswhenitisknowntheirstressismoreacuteandchronic. Ifsomethinghappenseverydaymaybeit’’snotseenasastressorGrzywaczsays.Maybeitisjustlife. stressfuladj.紧张的压力重的 diploman.毕业文凭毕业证书 stressorn.紧张刺激物 devastatingadj.毁灭性的 follow-upn.对病人的随访 Stressleveliscloselyrelatedto______.
ModernDrugs Doctorssixtyyearsagocoulddolittletohelpvictimsofpolio.Seriouscasesusuallyendedindeath.In1955avaccinewasdevelopedthatpreventedthedisease.Todaypolioisnolongeramajorhealthproblem. Manyofthemostimportantdrugsthatdoctorsprescribetodayhavebeendevelopedinthelast30years.Moderndrugsarecomplexspecificandpowerful.Peopleneedtoknowmoreaboutdrugsinordertousethemsafely. Earlypeoplediscoveredbyaccidentthatsomeoftheplantsgrowingaroundthemseemedusefultohealsoresrelievepainorevencurediseases.Theseplantswerethefirstdrugs.Nowplantsarestillthesourceofsomedrugs.Quinineforexampleisabitter-tastingdrugusedtotreatthechillsandfeverofmalariaandtoreduceattacksofthedisease.ItismadefromthebarkofthecinchonatreewhichgrowsintheAndesMountains.TheIndiansofthatregionwerethefirsttousethebarkasamedicine.TheSpanishpeopleprobablybroughtittoEuropeintheearly1600s.Chemistslearnedhowtogetthepuredrugfromthebarkandin1944;itwasmadeartificiallyinthelaboratory. Otherimportantdrugssuchashormonesandvaccinesareobtainedfromanimals.Butmostofthemoderndrugscomefromchemicalcombinationsworkedoutbyresearchscientists.Mostpeopleneverseedrugsintheirsimpleformaschemicals.Insteadtheyareseenastabletscapsulesorliquidsthatcontainthedrugandotheringredients. Peopleusedrugstogetdifferentresults.Somedrugsattacktheorganismthatcausesadisease.Theycurebykillingtheorganism.Otherdrugsrelievewhatwecallthesymptomsofthedisease:theheadachepainfeverorchillsandmakethepatientmorecomfortable.Theseconstitutemostover-the-counterdrugs.Peoplecangetthemindrugstores. Itseemstotheauthorthatthemedicineusedbyearlypeople______.
CigarsInstead? Smokingoneortwocigarsadaydoublestheriskofcancersoftheliptonguemouthandthroataccordingtoagovernmentstudy. DailycigarsalsoincreasetheriskoflungcancerandcanceroftheesophagusandincreasetheriskofcancerofthelarynxvoiceboxsixfoldsayresearchersattheNationalCancerInstituteinBethesdaMaryland. Inadditionthereportrevealedthatsmokingthreeorfourcigarsadayincreasedtheriskoforalcancerto8.5timestheriskfornonsmokersandtheriskofesophagealcancerbyfourtimestheriskofnonsmokers. ThehealtheffectsofsmokingcigarsisoneofeightsectionsofthearticleCigars:HealthEffectsandTrends.Theresearchersreportthatcomparedwithacigarettealargecigaremitsupto90timesasmuchcarcinogenictobacco-specificnitrosamines ThisarticleprovidesclearandinvaluableinformationaboutthedisturbingincreaseincigaruseandthesignificantpublichealthconsequencesforthecountrysaidDr.RichardKlausnerdirectoroftheNationalCancerInstituteinastatement. Thedataareclear-theharmfulsubstancesandcarcinogensincigarsmokelikecigarettesareassociatedwiththeincreasedrisksofseveralkindsofcancersaswellasheartandlungdiseasesheadded.Inotherwordscigarsarenotsafealternativestocigarettesandmaybeaddictive. Tothoseindividualswhomaybethinkingaboutsmokingcigarsouradvicesis—don’’t.TothosecurrentlysmokingcigarsquittingistheonlywaytoeliminatecompletelythecancerheartandlungdiseaseriskswarnedKlausner. AccordingtoaNationalCancerInstitutepressreleasetherehaven’’tbeenanystudiesonthehealtheffectsonnonsmokersatcigarsocialeventsbut...asignificantbodyofevidenceclearlydemonstratesanincreasedlungcancerriskfromsecondhandsmoke. WhatisthemainideaofthearticleCigars:HealthEffectsandTrends?
Theprojectfordevelopinglocalindustrieswasevaluatedforitsusefulnessfeasibilityandeasinessofexecution.
NewTechniquePromisesEarlierCancerDetection AnewtechniquecouldrevolutionizetheearlydetectionofcancergivingsufferersagreaterchanceofbeatingthediseaseAmericanscientistssaid.ResearchersattheMassachusettsInstituteofTechnologyhavedevisedanovelmethodof【51】changesinthenucleusofcellsintheearlieststagesofthedisease.Morethan85percentofallcancersoriginateintheepithelium上皮thatlinestheinternalsurfacesoforgans【52】thebody.Althoughthesearetreatable【53】theyarediagnosedinoneofthepreventablestagesearlybodydamagesarealmost【54】todetectsaidscientistFeld.Wepresentanewoptical-probe光学探子techniquebasedonlight-scatteringspectroscopy分光镜检查thatisable【55】detectprecancerousandearlycancerouscellsincell-richepitheliaheaddedinastatement. Thenewtechniquereliesonthefact【56】cellnucleichangeintheearlystagesofcancerandthedifferencesscatterlightinacharacteristicway.Untilnowthechangeswereonlydetectable【57】abiopsy活检wastakenthescientistssaid.Thenewtechnique【58】inthesciencejournalNaturecanbeusedinconjunctionwitharoutinecancerscreeningandsurveillancetechniquewhichusesanendoscope内窥镜—aflexibleopticalprobe【59】withcameraswhichisinsertedintoacavityinthebody—tocheck【60】cancers. Thescientistssaidthey【61】theirnewtechniqueinfourdifferentorgansduringroutineendoscopiccancerscreening.Thetipoftheopticalprobewasbroughtintocontactwiththetissuetobetestedandthescatteringoflightwasrecordedwithouttheneedforanytissuetobe【62】thescientistssaid.Ourresultsshowthatlight-scatteringspectroscopyhasthepotentialtodetectpre-cancerousbodydamagesandpreinvasivecancersthroughoutthebody.Thistechniqueshould【63】improvetheefficiencyofcancerscreeningandsurveillancethescientistssaid.Cancerisoneofthebiggest【64】inindustrializedcountries.【65】tofiguresfromtheWorldHealthOrganization10millionpeoplewerediagnosedwiththediseaseworldwidein1997andsixmilliondied.
Vegetarianism Astrictvegetarianisapersonwhoneverinhislifeeatsanythingderivedfromanimals.Themainobjectiontovegetarianismonalong-termbasisisthedifficultytogettingenoughproteinthebodybuildingelementsinfood.Ifyouhaveeverbeenwithoutmeatoranimalfoodsforsomedaysofweekssayreligiousreasonsyouwillhavenoticedthatyoutendtogetphysicallyratherweak.Youaregladwhenthefastisoverandyougetyourrewardofasucculentmeatmeal.Proteinsarebuiltupfromapproximatelytwentyfoodelementscalledamino-acidswhicharefoundmoreabundantlyinanimalproteinthaninvegetableprotein.Thismeansyouhavetoeatagreatdealmorevegetablethananimalfoodinordertogetenoughoftheseamino-acids.Agreatofthevegetablefoodgoestowasteinthisprocessandfromthephysiologicalpointofviewthereisnotmuchtobesaidinfavoroflife-longvegetarianism. Theeconomicsideofthequestionthoughmustbeconsidered.Vegetablefoodismuchcheaperthananimalfood.Howeversinceonlyasmallproportionofthevegetableproteinisusefulforbody-buildingpurposesaconsistentvegetarianifheistogainthenecessary70gramsofproteinadayhastoconsumeagreaterbulkoffoodthanhisdigestiveorganscancomfortablydealwith.Infairnessthoughitmustbepointedoutthatvegetariansclaimtheyneedfarlessthan70gramsofproteinaday. Whetherornotvegetarianismshouldbeadvocatedforadultsitisdefinitelyunsatisfactoryforgrowingchildrenwhoneedmoreproteinthantheycangetfromvegetablesource’’s.Alacto-vegetariandietwhichincludesmilkandmilkproductssuchascheesecanhoweverbesatisfactoryaslongasenoughmilkandmilkproductsareconsumed. Meatandcheesearethebestsourcesofusabledigestibleandnextcomemilkfishandeggs.Slowandcarefulcookingofmeatmakesitmoredigestibleandassistsinthebreakingdownoftheproteincontentbythebody.Whencookingvegetableshoweverthevitaminsandinparticularthewater-solubevitaminCshouldbelostthroughovercooking. Avegetarianisapersonwho______.
NewTechniquePromisesEarlierCancerDetection AnewtechniquecouldrevolutionizetheearlydetectionofcancergivingsufferersagreaterchanceofbeatingthediseaseAmericanscientistssaid.ResearchersattheMassachusettsInstituteofTechnologyhavedevisedanovelmethodof【51】changesinthenucleusofcellsintheearlieststagesofthedisease.Morethan85percentofallcancersoriginateintheepithelium上皮thatlinestheinternalsurfacesoforgans【52】thebody.Althoughthesearetreatable【53】theyarediagnosedinoneofthepreventablestagesearlybodydamagesarealmost【54】todetectsaidscientistFeld.Wepresentanewoptical-probe光学探子techniquebasedonlight-scatteringspectroscopy分光镜检查thatisable【55】detectprecancerousandearlycancerouscellsincell-richepitheliaheaddedinastatement. Thenewtechniquereliesonthefact【56】cellnucleichangeintheearlystagesofcancerandthedifferencesscatterlightinacharacteristicway.Untilnowthechangeswereonlydetectable【57】abiopsy活检wastakenthescientistssaid.Thenewtechnique【58】inthesciencejournalNaturecanbeusedinconjunctionwitharoutinecancerscreeningandsurveillancetechniquewhichusesanendoscope内窥镜—aflexibleopticalprobe【59】withcameraswhichisinsertedintoacavityinthebody—tocheck【60】cancers. Thescientistssaidthey【61】theirnewtechniqueinfourdifferentorgansduringroutineendoscopiccancerscreening.Thetipoftheopticalprobewasbroughtintocontactwiththetissuetobetestedandthescatteringoflightwasrecordedwithouttheneedforanytissuetobe【62】thescientistssaid.Ourresultsshowthatlight-scatteringspectroscopyhasthepotentialtodetectpre-cancerousbodydamagesandpreinvasivecancersthroughoutthebody.Thistechniqueshould【63】improvetheefficiencyofcancerscreeningandsurveillancethescientistssaid.Cancerisoneofthebiggest【64】inindustrializedcountries.【65】tofiguresfromtheWorldHealthOrganization10millionpeoplewerediagnosedwiththediseaseworldwidein1997andsixmilliondied.
NewTechniquePromisesEarlierCancerDetection AnewtechniquecouldrevolutionizetheearlydetectionofcancergivingsufferersagreaterchanceofbeatingthediseaseAmericanscientistssaid.ResearchersattheMassachusettsInstituteofTechnologyhavedevisedanovelmethodof【51】changesinthenucleusofcellsintheearlieststagesofthedisease.Morethan85percentofallcancersoriginateintheepithelium上皮thatlinestheinternalsurfacesoforgans【52】thebody.Althoughthesearetreatable【53】theyarediagnosedinoneofthepreventablestagesearlybodydamagesarealmost【54】todetectsaidscientistFeld.Wepresentanewoptical-probe光学探子techniquebasedonlight-scatteringspectroscopy分光镜检查thatisable【55】detectprecancerousandearlycancerouscellsincell-richepitheliaheaddedinastatement. Thenewtechniquereliesonthefact【56】cellnucleichangeintheearlystagesofcancerandthedifferencesscatterlightinacharacteristicway.Untilnowthechangeswereonlydetectable【57】abiopsy活检wastakenthescientistssaid.Thenewtechnique【58】inthesciencejournalNaturecanbeusedinconjunctionwitharoutinecancerscreeningandsurveillancetechniquewhichusesanendoscope内窥镜—aflexibleopticalprobe【59】withcameraswhichisinsertedintoacavityinthebody—tocheck【60】cancers. Thescientistssaidthey【61】theirnewtechniqueinfourdifferentorgansduringroutineendoscopiccancerscreening.Thetipoftheopticalprobewasbroughtintocontactwiththetissuetobetestedandthescatteringoflightwasrecordedwithouttheneedforanytissuetobe【62】thescientistssaid.Ourresultsshowthatlight-scatteringspectroscopyhasthepotentialtodetectpre-cancerousbodydamagesandpreinvasivecancersthroughoutthebody.Thistechniqueshould【63】improvetheefficiencyofcancerscreeningandsurveillancethescientistssaid.Cancerisoneofthebiggest【64】inindustrializedcountries.【65】tofiguresfromtheWorldHealthOrganization10millionpeoplewerediagnosedwiththediseaseworldwidein1997andsixmilliondied.
Dyslexia Asmanyas20%ofallchildrenintheUnitedStatessufferfromsomeformofthelearningdisorder2calleddyslexia. Expertsondyslexiasaythattheproblemisnotadisease.Theysaythatpersonswithdyslexiauseinformationinadifferentway.Oneoftheworldsgreatthinkersandscientists.AlbertEinsteinwasdyslexic.Einsteinsaidthatheneverthoughtinwordsthewaythatmostpeopledo.Hesaidthathethoughtinpicturesinstead. TheAmericaninventorThomasEdisonwasalsodyslexic.DyslexiafirstwasrecognizedinEuropeandtheUnitedStatesmorethan80yearsago.Manyyearspassedbeforedoctorsdiscoveredthatpersonswiththedisorderwerenotmentallyslowordisabled.Thedoctorsfoundthatthebrainsofpersonswithdyslexiaaredifferent. Inmostpeopletheleftsideofthebrain—thepartthatcontrolslanguageislargerthantherightside.Inpersonswithdyslexiatherightsideofthebrainisbigger.Doctorsarenotsurewhatcausesthisdifference.Howeverresearchhasshownthatdyslexiaismorecommoninmalesthaninfemalesanditisfoundmoreofteninpersonswhoarelefthanded4.Nooneknowsthecauseofdyslexiabutsomescientistsbelievethatitmayresultfromchemicalchangesinababy’’sbodylongbeforeitisborn.Theyaretryingtofindwaystoteachpersonswithdyslexia.Dyslexicpersonsthinkdifferentlyandneedspecialkindsofteachinghelp.Aftertheyhavesolvedtheirproblemswithlanguagetheyoftenshowthemselvestobeespeciallyintelligentorcreative. Itisbelievedthatdyslexiaisrelatedtothebadhabitsofababy’smother.
NewTechniquePromisesEarlierCancerDetection AnewtechniquecouldrevolutionizetheearlydetectionofcancergivingsufferersagreaterchanceofbeatingthediseaseAmericanscientistssaid.ResearchersattheMassachusettsInstituteofTechnologyhavedevisedanovelmethodof【51】changesinthenucleusofcellsintheearlieststagesofthedisease.Morethan85percentofallcancersoriginateintheepithelium上皮thatlinestheinternalsurfacesoforgans【52】thebody.Althoughthesearetreatable【53】theyarediagnosedinoneofthepreventablestagesearlybodydamagesarealmost【54】todetectsaidscientistFeld.Wepresentanewoptical-probe光学探子techniquebasedonlight-scatteringspectroscopy分光镜检查thatisable【55】detectprecancerousandearlycancerouscellsincell-richepitheliaheaddedinastatement. Thenewtechniquereliesonthefact【56】cellnucleichangeintheearlystagesofcancerandthedifferencesscatterlightinacharacteristicway.Untilnowthechangeswereonlydetectable【57】abiopsy活检wastakenthescientistssaid.Thenewtechnique【58】inthesciencejournalNaturecanbeusedinconjunctionwitharoutinecancerscreeningandsurveillancetechniquewhichusesanendoscope内窥镜—aflexibleopticalprobe【59】withcameraswhichisinsertedintoacavityinthebody—tocheck【60】cancers. Thescientistssaidthey【61】theirnewtechniqueinfourdifferentorgansduringroutineendoscopiccancerscreening.Thetipoftheopticalprobewasbroughtintocontactwiththetissuetobetestedandthescatteringoflightwasrecordedwithouttheneedforanytissuetobe【62】thescientistssaid.Ourresultsshowthatlight-scatteringspectroscopyhasthepotentialtodetectpre-cancerousbodydamagesandpreinvasivecancersthroughoutthebody.Thistechniqueshould【63】improvetheefficiencyofcancerscreeningandsurveillancethescientistssaid.Cancerisoneofthebiggest【64】inindustrializedcountries.【65】tofiguresfromtheWorldHealthOrganization10millionpeoplewerediagnosedwiththediseaseworldwidein1997andsixmilliondied.
ThecurrenteditionofthatmagazinediscussestheancientcivilizationofLatinAmerica.
Thelittlegirlswerecommendedfortheirwonderfuldancepresentation.
Hisplanshouldsucceedforitseemsquitefeasible.
StressLevelTiedtoEducationLevel PeoplewithlesseducationsufferfewerstressfuldaysaccordingtoareportinthecurrentissueoftheJournalofHealthandSocialBehavior. Howeverthestudyalsofoundthatwhenless-educatedpeopledidsufferstressitwasmoresevereandhadalargerimpactontheirhealth. Fromthisresearchershaveconcludedthattheday-to-dayfactorsthatcausestressarenotrandom.Whereyouareinsocietydeterminesthekindsofproblemsthatyouhaveeachdayandhowwellyouwillcopewiththem. Theresearchteaminterviewedanationalsampleof1031adultsdailyforeightdaysabouttheirstresslevelandhealth.Peoplewithoutahighschooldiplomareportedstresson30percentofthestudydayspeoplewithahighschooldegreereportedstress38percentofthetimeandpeoplewithcollegedegreesreportedstress44percentofthetime. Lessadvantagedpeoplearelesshealthyonadailybasisandaremorelikelytohavedownwardturnsintheirhealth.leadresearcherDr.JosephGrzywaczofWakeForestUniversityBaptistMedicalCentersaidinapreparedstatement.Thedownwardturnsinhealthwereconnectedwithdailystressorsandtheeffectofdailystressorsontheirhealthismuchmoredevastatingforthelessadvantaged. Grzywaczsuggestedfollow-upresearchtodeterminewhyless-educatedpeoplereportfewerdaysofstresswhenitisknowntheirstressismoreacuteandchronic. Ifsomethinghappenseverydaymaybeit’’snotseenasastressorGrzywaczsays.Maybeitisjustlife. stressfuladj.紧张的压力重的 diploman.毕业文凭毕业证书 stressorn.紧张刺激物 devastatingadj.毁灭性的 follow-upn.对病人的随访 Less—educatedpeoplereportfewerdaysofstresspossiblybecause______.
Thedoctorsoonmadetheworriedpatientfeelcomfortable.
CigarsInstead? Smokingoneortwocigarsadaydoublestheriskofcancersoftheliptonguemouthandthroataccordingtoagovernmentstudy. DailycigarsalsoincreasetheriskoflungcancerandcanceroftheesophagusandincreasetheriskofcancerofthelarynxvoiceboxsixfoldsayresearchersattheNationalCancerInstituteinBethesdaMaryland. Inadditionthereportrevealedthatsmokingthreeorfourcigarsadayincreasedtheriskoforalcancerto8.5timestheriskfornonsmokersandtheriskofesophagealcancerbyfourtimestheriskofnonsmokers. ThehealtheffectsofsmokingcigarsisoneofeightsectionsofthearticleCigars:HealthEffectsandTrends.Theresearchersreportthatcomparedwithacigarettealargecigaremitsupto90timesasmuchcarcinogenictobacco-specificnitrosamines ThisarticleprovidesclearandinvaluableinformationaboutthedisturbingincreaseincigaruseandthesignificantpublichealthconsequencesforthecountrysaidDr.RichardKlausnerdirectoroftheNationalCancerInstituteinastatement. Thedataareclear-theharmfulsubstancesandcarcinogensincigarsmokelikecigarettesareassociatedwiththeincreasedrisksofseveralkindsofcancersaswellasheartandlungdiseasesheadded.Inotherwordscigarsarenotsafealternativestocigarettesandmaybeaddictive. Tothoseindividualswhomaybethinkingaboutsmokingcigarsouradvicesis—don’’t.TothosecurrentlysmokingcigarsquittingistheonlywaytoeliminatecompletelythecancerheartandlungdiseaseriskswarnedKlausner. AccordingtoaNationalCancerInstitutepressreleasetherehaven’’tbeenanystudiesonthehealtheffectsonnonsmokersatcigarsocialeventsbut...asignificantbodyofevidenceclearlydemonstratesanincreasedlungcancerriskfromsecondhandsmoke. Accordingtothereportsmokingthreeorfourcigarsaday______.
NewTechniquePromisesEarlierCancerDetection AnewtechniquecouldrevolutionizetheearlydetectionofcancergivingsufferersagreaterchanceofbeatingthediseaseAmericanscientistssaid.ResearchersattheMassachusettsInstituteofTechnologyhavedevisedanovelmethodof【51】changesinthenucleusofcellsintheearlieststagesofthedisease.Morethan85percentofallcancersoriginateintheepithelium上皮thatlinestheinternalsurfacesoforgans【52】thebody.Althoughthesearetreatable【53】theyarediagnosedinoneofthepreventablestagesearlybodydamagesarealmost【54】todetectsaidscientistFeld.Wepresentanewoptical-probe光学探子techniquebasedonlight-scatteringspectroscopy分光镜检查thatisable【55】detectprecancerousandearlycancerouscellsincell-richepitheliaheaddedinastatement. Thenewtechniquereliesonthefact【56】cellnucleichangeintheearlystagesofcancerandthedifferencesscatterlightinacharacteristicway.Untilnowthechangeswereonlydetectable【57】abiopsy活检wastakenthescientistssaid.Thenewtechnique【58】inthesciencejournalNaturecanbeusedinconjunctionwitharoutinecancerscreeningandsurveillancetechniquewhichusesanendoscope内窥镜—aflexibleopticalprobe【59】withcameraswhichisinsertedintoacavityinthebody—tocheck【60】cancers. Thescientistssaidthey【61】theirnewtechniqueinfourdifferentorgansduringroutineendoscopiccancerscreening.Thetipoftheopticalprobewasbroughtintocontactwiththetissuetobetestedandthescatteringoflightwasrecordedwithouttheneedforanytissuetobe【62】thescientistssaid.Ourresultsshowthatlight-scatteringspectroscopyhasthepotentialtodetectpre-cancerousbodydamagesandpreinvasivecancersthroughoutthebody.Thistechniqueshould【63】improvetheefficiencyofcancerscreeningandsurveillancethescientistssaid.Cancerisoneofthebiggest【64】inindustrializedcountries.【65】tofiguresfromtheWorldHealthOrganization10millionpeoplewerediagnosedwiththediseaseworldwidein1997andsixmilliondied.
Dyslexia Asmanyas20%ofallchildrenintheUnitedStatessufferfromsomeformofthelearningdisorder2calleddyslexia. Expertsondyslexiasaythattheproblemisnotadisease.Theysaythatpersonswithdyslexiauseinformationinadifferentway.Oneoftheworldsgreatthinkersandscientists.AlbertEinsteinwasdyslexic.Einsteinsaidthatheneverthoughtinwordsthewaythatmostpeopledo.Hesaidthathethoughtinpicturesinstead. TheAmericaninventorThomasEdisonwasalsodyslexic.DyslexiafirstwasrecognizedinEuropeandtheUnitedStatesmorethan80yearsago.Manyyearspassedbeforedoctorsdiscoveredthatpersonswiththedisorderwerenotmentallyslowordisabled.Thedoctorsfoundthatthebrainsofpersonswithdyslexiaaredifferent. Inmostpeopletheleftsideofthebrain—thepartthatcontrolslanguageislargerthantherightside.Inpersonswithdyslexiatherightsideofthebrainisbigger.Doctorsarenotsurewhatcausesthisdifference.Howeverresearchhasshownthatdyslexiaismorecommoninmalesthaninfemalesanditisfoundmoreofteninpersonswhoarelefthanded4.Nooneknowsthecauseofdyslexiabutsomescientistsbelievethatitmayresultfromchemicalchangesinababy’’sbodylongbeforeitisborn.Theyaretryingtofindwaystoteachpersonswithdyslexia.Dyslexicpersonsthinkdifferentlyandneedspecialkindsofteachinghelp.Aftertheyhavesolvedtheirproblemswithlanguagetheyoftenshowthemselvestobeespeciallyintelligentorcreative. Manygreatthinkersandscientistsintheworldaredyslexic.
ModernDrugs Doctorssixtyyearsagocoulddolittletohelpvictimsofpolio.Seriouscasesusuallyendedindeath.In1955avaccinewasdevelopedthatpreventedthedisease.Todaypolioisnolongeramajorhealthproblem. Manyofthemostimportantdrugsthatdoctorsprescribetodayhavebeendevelopedinthelast30years.Moderndrugsarecomplexspecificandpowerful.Peopleneedtoknowmoreaboutdrugsinordertousethemsafely. Earlypeoplediscoveredbyaccidentthatsomeoftheplantsgrowingaroundthemseemedusefultohealsoresrelievepainorevencurediseases.Theseplantswerethefirstdrugs.Nowplantsarestillthesourceofsomedrugs.Quinineforexampleisabitter-tastingdrugusedtotreatthechillsandfeverofmalariaandtoreduceattacksofthedisease.ItismadefromthebarkofthecinchonatreewhichgrowsintheAndesMountains.TheIndiansofthatregionwerethefirsttousethebarkasamedicine.TheSpanishpeopleprobablybroughtittoEuropeintheearly1600s.Chemistslearnedhowtogetthepuredrugfromthebarkandin1944;itwasmadeartificiallyinthelaboratory. Otherimportantdrugssuchashormonesandvaccinesareobtainedfromanimals.Butmostofthemoderndrugscomefromchemicalcombinationsworkedoutbyresearchscientists.Mostpeopleneverseedrugsintheirsimpleformaschemicals.Insteadtheyareseenastabletscapsulesorliquidsthatcontainthedrugandotheringredients. Peopleusedrugstogetdifferentresults.Somedrugsattacktheorganismthatcausesadisease.Theycurebykillingtheorganism.Otherdrugsrelievewhatwecallthesymptomsofthedisease:theheadachepainfeverorchillsandmakethepatientmorecomfortable.Theseconstitutemostover-the-counterdrugs.Peoplecangetthemindrugstores. Itisimpliedinthepassagethatmostdrugscanbe______.
Thesoundofthedrumswasdistinctevenfromadistance.
StressLevelTiedtoEducationLevel PeoplewithlesseducationsufferfewerstressfuldaysaccordingtoareportinthecurrentissueoftheJournalofHealthandSocialBehavior. Howeverthestudyalsofoundthatwhenless-educatedpeopledidsufferstressitwasmoresevereandhadalargerimpactontheirhealth. Fromthisresearchershaveconcludedthattheday-to-dayfactorsthatcausestressarenotrandom.Whereyouareinsocietydeterminesthekindsofproblemsthatyouhaveeachdayandhowwellyouwillcopewiththem. Theresearchteaminterviewedanationalsampleof1031adultsdailyforeightdaysabouttheirstresslevelandhealth.Peoplewithoutahighschooldiplomareportedstresson30percentofthestudydayspeoplewithahighschooldegreereportedstress38percentofthetimeandpeoplewithcollegedegreesreportedstress44percentofthetime. Lessadvantagedpeoplearelesshealthyonadailybasisandaremorelikelytohavedownwardturnsintheirhealth.leadresearcherDr.JosephGrzywaczofWakeForestUniversityBaptistMedicalCentersaidinapreparedstatement.Thedownwardturnsinhealthwereconnectedwithdailystressorsandtheeffectofdailystressorsontheirhealthismuchmoredevastatingforthelessadvantaged. Grzywaczsuggestedfollow-upresearchtodeterminewhyless-educatedpeoplereportfewerdaysofstresswhenitisknowntheirstressismoreacuteandchronic. Ifsomethinghappenseverydaymaybeit’’snotseenasastressorGrzywaczsays.Maybeitisjustlife. stressfuladj.紧张的压力重的 diploman.毕业文凭毕业证书 stressorn.紧张刺激物 devastatingadj.毁灭性的 follow-upn.对病人的随访 Whichgroupreportedthebiggestnumberofstressfuldays?
NewTechniquePromisesEarlierCancerDetection AnewtechniquecouldrevolutionizetheearlydetectionofcancergivingsufferersagreaterchanceofbeatingthediseaseAmericanscientistssaid.ResearchersattheMassachusettsInstituteofTechnologyhavedevisedanovelmethodof【51】changesinthenucleusofcellsintheearlieststagesofthedisease.Morethan85percentofallcancersoriginateintheepithelium上皮thatlinestheinternalsurfacesoforgans【52】thebody.Althoughthesearetreatable【53】theyarediagnosedinoneofthepreventablestagesearlybodydamagesarealmost【54】todetectsaidscientistFeld.Wepresentanewoptical-probe光学探子techniquebasedonlight-scatteringspectroscopy分光镜检查thatisable【55】detectprecancerousandearlycancerouscellsincell-richepitheliaheaddedinastatement. Thenewtechniquereliesonthefact【56】cellnucleichangeintheearlystagesofcancerandthedifferencesscatterlightinacharacteristicway.Untilnowthechangeswereonlydetectable【57】abiopsy活检wastakenthescientistssaid.Thenewtechnique【58】inthesciencejournalNaturecanbeusedinconjunctionwitharoutinecancerscreeningandsurveillancetechniquewhichusesanendoscope内窥镜—aflexibleopticalprobe【59】withcameraswhichisinsertedintoacavityinthebody—tocheck【60】cancers. Thescientistssaidthey【61】theirnewtechniqueinfourdifferentorgansduringroutineendoscopiccancerscreening.Thetipoftheopticalprobewasbroughtintocontactwiththetissuetobetestedandthescatteringoflightwasrecordedwithouttheneedforanytissuetobe【62】thescientistssaid.Ourresultsshowthatlight-scatteringspectroscopyhasthepotentialtodetectpre-cancerousbodydamagesandpreinvasivecancersthroughoutthebody.Thistechniqueshould【63】improvetheefficiencyofcancerscreeningandsurveillancethescientistssaid.Cancerisoneofthebiggest【64】inindustrializedcountries.【65】tofiguresfromtheWorldHealthOrganization10millionpeoplewerediagnosedwiththediseaseworldwidein1997andsixmilliondied.
Dyslexia Asmanyas20%ofallchildrenintheUnitedStatessufferfromsomeformofthelearningdisorder2calleddyslexia. Expertsondyslexiasaythattheproblemisnotadisease.Theysaythatpersonswithdyslexiauseinformationinadifferentway.Oneoftheworldsgreatthinkersandscientists.AlbertEinsteinwasdyslexic.Einsteinsaidthatheneverthoughtinwordsthewaythatmostpeopledo.Hesaidthathethoughtinpicturesinstead. TheAmericaninventorThomasEdisonwasalsodyslexic.DyslexiafirstwasrecognizedinEuropeandtheUnitedStatesmorethan80yearsago.Manyyearspassedbeforedoctorsdiscoveredthatpersonswiththedisorderwerenotmentallyslowordisabled.Thedoctorsfoundthatthebrainsofpersonswithdyslexiaaredifferent. Inmostpeopletheleftsideofthebrain—thepartthatcontrolslanguageislargerthantherightside.Inpersonswithdyslexiatherightsideofthebrainisbigger.Doctorsarenotsurewhatcausesthisdifference.Howeverresearchhasshownthatdyslexiaismorecommoninmalesthaninfemalesanditisfoundmoreofteninpersonswhoarelefthanded4.Nooneknowsthecauseofdyslexiabutsomescientistsbelievethatitmayresultfromchemicalchangesinababy’’sbodylongbeforeitisborn.Theyaretryingtofindwaystoteachpersonswithdyslexia.Dyslexicpersonsthinkdifferentlyandneedspecialkindsofteachinghelp.Aftertheyhavesolvedtheirproblemswithlanguagetheyoftenshowthemselvestobeespeciallyintelligentorcreative. Theleftsideofthebraininadyslexicpersonisbiggerthantherightside.
Vegetarianism Astrictvegetarianisapersonwhoneverinhislifeeatsanythingderivedfromanimals.Themainobjectiontovegetarianismonalong-termbasisisthedifficultytogettingenoughproteinthebodybuildingelementsinfood.Ifyouhaveeverbeenwithoutmeatoranimalfoodsforsomedaysofweekssayreligiousreasonsyouwillhavenoticedthatyoutendtogetphysicallyratherweak.Youaregladwhenthefastisoverandyougetyourrewardofasucculentmeatmeal.Proteinsarebuiltupfromapproximatelytwentyfoodelementscalledamino-acidswhicharefoundmoreabundantlyinanimalproteinthaninvegetableprotein.Thismeansyouhavetoeatagreatdealmorevegetablethananimalfoodinordertogetenoughoftheseamino-acids.Agreatofthevegetablefoodgoestowasteinthisprocessandfromthephysiologicalpointofviewthereisnotmuchtobesaidinfavoroflife-longvegetarianism. Theeconomicsideofthequestionthoughmustbeconsidered.Vegetablefoodismuchcheaperthananimalfood.Howeversinceonlyasmallproportionofthevegetableproteinisusefulforbody-buildingpurposesaconsistentvegetarianifheistogainthenecessary70gramsofproteinadayhastoconsumeagreaterbulkoffoodthanhisdigestiveorganscancomfortablydealwith.Infairnessthoughitmustbepointedoutthatvegetariansclaimtheyneedfarlessthan70gramsofproteinaday. Whetherornotvegetarianismshouldbeadvocatedforadultsitisdefinitelyunsatisfactoryforgrowingchildrenwhoneedmoreproteinthantheycangetfromvegetablesource’’s.Alacto-vegetariandietwhichincludesmilkandmilkproductssuchascheesecanhoweverbesatisfactoryaslongasenoughmilkandmilkproductsareconsumed. Meatandcheesearethebestsourcesofusabledigestibleandnextcomemilkfishandeggs.Slowandcarefulcookingofmeatmakesitmoredigestibleandassistsinthebreakingdownoftheproteincontentbythebody.Whencookingvegetableshoweverthevitaminsandinparticularthewater-solubevitaminCshouldbelostthroughovercooking. Theunderlinedwordlacto-vegetarianinPara.4means______.
CigarsInstead? Smokingoneortwocigarsadaydoublestheriskofcancersoftheliptonguemouthandthroataccordingtoagovernmentstudy. DailycigarsalsoincreasetheriskoflungcancerandcanceroftheesophagusandincreasetheriskofcancerofthelarynxvoiceboxsixfoldsayresearchersattheNationalCancerInstituteinBethesdaMaryland. Inadditionthereportrevealedthatsmokingthreeorfourcigarsadayincreasedtheriskoforalcancerto8.5timestheriskfornonsmokersandtheriskofesophagealcancerbyfourtimestheriskofnonsmokers. ThehealtheffectsofsmokingcigarsisoneofeightsectionsofthearticleCigars:HealthEffectsandTrends.Theresearchersreportthatcomparedwithacigarettealargecigaremitsupto90timesasmuchcarcinogenictobacco-specificnitrosamines ThisarticleprovidesclearandinvaluableinformationaboutthedisturbingincreaseincigaruseandthesignificantpublichealthconsequencesforthecountrysaidDr.RichardKlausnerdirectoroftheNationalCancerInstituteinastatement. Thedataareclear-theharmfulsubstancesandcarcinogensincigarsmokelikecigarettesareassociatedwiththeincreasedrisksofseveralkindsofcancersaswellasheartandlungdiseasesheadded.Inotherwordscigarsarenotsafealternativestocigarettesandmaybeaddictive. Tothoseindividualswhomaybethinkingaboutsmokingcigarsouradvicesis—don’’t.TothosecurrentlysmokingcigarsquittingistheonlywaytoeliminatecompletelythecancerheartandlungdiseaseriskswarnedKlausner. AccordingtoaNationalCancerInstitutepressreleasetherehaven’’tbeenanystudiesonthehealtheffectsonnonsmokersatcigarsocialeventsbut...asignificantbodyofevidenceclearlydemonstratesanincreasedlungcancerriskfromsecondhandsmoke. Inthecontextofthispassagesecondhandsmokemaymean______.
Hemaintainedthattheopinionwaswrong.
TheGeneIndustry Majorcompaniesarealreadyinpursuitofcommercialapplicationsofthenewbiology.Theydreamofplacingenzymesintheautomobiletomonitorexhaustandsenddataonpollutiontoamicroprocessorthatwillthenadjusttheengine.TheyspeakofwhattheNewYorkTimescallsmetal—hungrymicrobesthatmightbeusedtominevaluabletracemetalsfromoceanwater.Theyhavealreadydemandedandwontherighttopatentnewlifeforms. Nervouscriticsincludingmanyscientistsworrythatthereiscorporatenationalinternationalandinter-scientificrivalryintheentirebiotechnologicalfield.Theycreateimagesnotofoilspillsbutofmicrobespillsthatcouldspreaddiseaseanddestroyentirepopulations.Thecreationandaccidentalreleaseofextremelypoisonousmicrobeshoweverisonlyonecauseforalarm.Completelyrationalandrespectablescientistsaretalkingaboutpossibilitiesthatstaggertheimagination. Shouldwebreedpeoplewithcow-likestomachssotheycandigestgrassandhaytherebyrelievingthefoodproblembymodifyingustoeatlowerdownonthefoodchain?Shouldwebiologicallyalterworkerstofitthejobrequirementforexamplecreatingpilotswithfasterreactiontimesorassembly-lineworkersdesignedtodoourmonotonousworkforus?Shouldweattempttoeliminateinferiorpeopleandbreedasuper-race?Hitlertriedthisbutwithoutthegeneticweaponrythatmaysoonissuefromourlaboratories.Shouldweproducesoldierstodoourfighting?Shouldweusegeneticforecastingtopre-eliminateunfitbabies?Shouldwegrowreserveorgansforourselveseachofushavingasitwereasavingsbankfullofsparekidneyliversorhands? Wildasthesenotionsmaysoundeveryonehasitsadvocatesandopposersinthescientificcommunityaswellasitsstrikingcommercialapplication.AstwocriticsofgeneticengineeringJeremyRifkinandTedHowardstateintheirbookWhoShouldPlayGod?BroadScalegeneticengineeringwillprobablybeintroducedtoAmericamuchthesamewayasassemblylinesautomobilesvaccinescomputersandalltheothertechnologies.Aseachnewgeneticadvancebecomescommerciallypracticalanewconsumerneedwillbeexploitedandamarketforthenewtechnologywillbecreated. AccordingtothepassageHitlerattemptedto______.
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