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1、MoreThan8HoursSleepTooMuchofaGoodThing 1 Althoughthedangersoftoolittlesleeparewidelyknown,newresearchsuggeststhatpeoplewhosleeptoomuchmayalsosuffertheconsequences. 2 InvestigatorsattheUniversityofCaliforniainSanDiegofoundthatpeoplewhoclockup19or10hourseachweekni
2、ghtappeartohavemoretroublefallingandstayingasleep,aswellasanumberofothersleepproblems,thanpeoplewhosleep8hoursanight Peoplewhosleptonly7hourseachnightalsosaidtheyhadmoretroublefallingasleepandfeelingrefreshedafteranight’ssleepthan8-hoursleepers.2 3 Thesefindings,
3、whichDr DanielKripkereportedinthejournalPsychosomaticMedicine3,demonstratethatpeoplewhowanttogetagoodnight’srestmaynotneedtosetaside4morethan8hoursanight Headdedthat“itmightbeagoodidea”forpeoplewhosleepmorethan8hourseachnighttoconsiderreducingtheamountoftimetheysp
4、endinbed,butcautionedthatmoreresearchisneededtoconfirmthis. 4 Previousstudieshaveshownthepotentialdangersofchronicshortagesofsleep—forinstance,onereportdemonstratedthatpeoplewhohabituallysleeplessthan7hourseachnighthaveahigherriskofdyingwithinafixedperiodthanpeop
5、lewhosleepmore. 5 Forthecurrentreport,Kripkereviewedtheresponsesof1,004adultstosleepquestionnaires,inwhichparticipantsindicatedhowmuchtheysleptduringtheweekandwhethertheyexperiencedanysleepproblems Sleepproblemsincludedwakinginthemiddleofthenight,arisingearlyinth
6、emorningandbeingunabletofallbacktosleep,andhavingfatigueinterferewithday-to-dayfunctioning5. 6 Kripkefoundthatpeoplewhosleptbetween9and10hourseachnightweremorelikelytoreportexperiencingeachsleepproblemthanpeoplewhoslept8hours Inaninterview,Kripkenotedthatlongslee
7、persmaystruggletogetrestatnightsimplybecausetheyspendtoomuchtimeinbed Asevidence,headdedthatonewaytohelpinsomniaistospendlesstimeinbed “Itstandstoreason6thatifapersonspendstoolongatimeinbed,thenthey’llspendahigherpercentageoftimeawake,”hesaid. 练习: 1.Paragraph2
8、________ 2.Paragraph4________ 3.Paragraph5________ 4.Paragraph6________ A Kripke’sResearchTool B DangersofHabitualShortagesofSleep C CriticismonKr