任务型阅读6请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入一个词。注意：每个空格只填1个单词；请将答案写在答题卡上相应题号的横线上.AspirinAspirin(acetylsalicylicacid)hasbeenusedformanyyearsasapainkiller.Italsohasananti-inflammatory(消炎)actionandcanbeusedtoreducefever.Aspirinisalreadyrecommendedforpeopletopreventstrokeandheartattackbecauseitimprovesone'sbloodcirculation.Somanypeoplealreadytakedailyaspirinasaheartdrug.Althoughaspirincancausedeadlyinternalbleeding,whichisrelativelyrare,itsbenefitsforpeoplearegreat,notonlytohelpincreasethelengthofpeople'slives,buttopreventandtreatcancer,ortostopcancerspreadaccordingtothelatestresearch.Takingalowdose(剂量)ofaspirineverydaycanpreventandpossiblyeventreatcancer,freshevidencesuggests.Prof.PeterRothwell,fromOxfordUniversity,andhiscolleagues,whocarriedoutthelatestwork,hadalreadylinkedaspirinwithalowerriskofcertaincancers,particularlybowel（肠）cancer.Buttheirpreviousworksuggestedpeopleneededtotakethedrugforabout10yearstogetanyprotection.Nowtheprotectiveeffectoccursmuchsooner—withinthreetofiveyears—basedonanewanalysisofdatafrom51trialsinvolvingmorethan77,000patients.Andaspirinappearsnotonlytoreducetheriskofdevelopingmanydifferentcancersinthefirstplace,butmayalsostopcancersspreadingaroundthebody.Takingalow(75—300mg)dailydoseofaspirinappearedtocutthetotalnumberofcancercasesby25%afteronlythreeyears—therewereninecancercasesper1,000eachyearintheaspirin-takinggroup,comparedwith12per1,000forthosetakingdummypills.Italsoreducedtheriskofacancerdeathby15%withinfiveyears(andsoonerifthedosewashigherthan300mg).Andifpatientsstayedonaspirinforlonger,theircancerdeathriskwentdownevenfurther—by37%afterfiveyears.Low-doseaspirinalsoappearedtoreducetheprobabilitythatcancers,particularlybowel,wouldspreadtootherpartsofthebody,andbyasmuchashalfinsomeinstances.However,Prof.Rothwellsaysformostfitandhealthypeople,themostimportantthingstheycandotoreducetheirlifetimecancerriskistogiveupsmoking,takeexerciseand-haveahealthydiet.Butexpertswarnthatthereisstillnotenoughprooftorecommendittopreventcancercasesanddeathsan