小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com课时作业(三)Unit1SectionⅢExtendedreading&Project&Furtherstudy阅读理解AIn2015,researchersfromAustralia'sDeakinUniversitypublishedoneofthefirststudiesmeasuringfood'sphysicaleffectonthelefthippocampus(海马体),aseahorse-shapedbrainregioncrucialformemory,learning,anddecisionmaking.ItisalsooneofthefirstareastoshrinkinpeoplewithAlzheimer'sdiseaseandotherformsofdementia(痴呆).255peoplefilledoutdietsurveysandthenunderwentMRI(磁共振扫描成像)thatmeasuredtheirbrains.Fouryearslater,theyreturnedforanotherscaninresponsetoarequestfromtheresearchers.Thestudyfoundthatthelefthippocampuswasbiggerandheavierinthehealthyeatersthanintheunhealthyones,regardlessofage,sex,weight,exercisehabits,orgeneralhealth.Thatmeanseatingtherightfoodsandskippingthewrongstuffcouldhelpprotectagainstdeclinesinthinkingandmemorythatleadtodementia.Healthyeatingdoesn'tjustpreventbraindecline.Itraisesscoresonthinkingandmemorytests,accordingtoastudypublishedinMarch2019thattracked2，621Americanwomenandmenfor30years.“Greenleafyvegetableshavegoodeffectsthatmayprotectbothfemalesandmalesagainstcognitive(认知的)declineanddementia，”saysleadresearcherClaireMcEvoy,RD,oftheCentreforPublicHealthatQueen'sUniversityBelfastinNorthernIreland.Evenalittlehealthyfoodgoesalongway.Accordingtoa2018RushUniversitystudythattracked960peoplefor4.7years,participantswhoatejust1.3extraservingsofgreenleafyvegetablesadayshowedcognitiveabilitiessimilartothoseofpeople11yearsyounger.Howarethesepowerfoodsworkingwithyourbraincells?Animalandtest-tubeexperimentssuggestthatcompoundsinhealthydietshelpnewcellsmakecopiesofDNAwhentheydivideandmultiply.Meanwhile,high-fat,high-sugarprocessedfoodsharmbraincells.Whilefoodservesasanimportantbrainprotector,expertssaybrainsupplements(补品)aren'tallthateffective.Studiesshowthattheydon'tmakebraincellsactiveinasignificantlypositiveway.“Letthebuyerbecautious，”saysDavidHogan,MD,aspecialistattheUniversityofCalgary.Astudyofnootropics(益智药)intheNovember2019JournaloftheAmericanMedicalAssociationrevealedthattheunapproveddrug—piracetam(乙酰胺吡咯烷酮)wasfoundinfouroutoffivebrandstested,atlevelsthatcouldcausesideeffectssuchasdepression．1．Whydidtheresearchershavethe255peoplereturnforanotherMRIscanfouryearslater?A．TotestwhethertheyhadAlzheimer'sdisease.B．Toseewhateffectsdietshadonthelefthippocampus.C．Tostudyhowtheykepthealthyinthefouryears.D．TodeepentheirresearchintoAlzheimer'sdisease.小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com2．WhatcanweinferfromParagraph2?A．Healthyeatinghelpstoreducetheriskofdementia.B．Unhealthydietisamajorcontributingfactorincognitivedecline.C．Ageandsexhavenothingtodowithourgeneralhealth.D．Plant-baseddietshavegreatereffectsonwomenthanmen.3．WhichofthefollowingwouldDavidHoganmostprobablyagreewith?A．Brainsupplementsareashelpfulashealthydiets.B．We'dbettertakebrainsupplementsforconvenience.C．Weshouldbecarefulwhentakingbrainsupplements.D．Brainsupplementshaveasmanysideeffectsasprocessedfoods.4．Whatmightbethebesttitleforthepassage?A．YestoGreenLeafyVegetablesB．YestoNootropicsC．NotoIntelligenceD．NotoDementiaBFeelinghungry?Thenwhat'stheeasiestwaytosatisfyyourhunger?Manyofuswillreachforatakeawaymenuandordersomedeliciousbutpossiblyunhealthyfood.Andourincreasinglybusyandstressfullivesaddtoourneedto...