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1、卫生B补全短文新增文章*第七篇 PowerNappingisGoodfortheI.Q.Todaywehearmoreandmoreabouttheimportanceofgettingenoughsleep—abouteighthoursanight.Sleepcanhelphealandgiveenergytoboththebodyandthebrain.Medicalexpertsnowbelievethatsleepisevenmoreimportantforhealththandietorexerci
2、seItseemsalmostcertainthatthethirdofourlivesthatwespendasleephasagreateffectonthetwo-thirdsthatweareawake.Sleepaffectsouremotions,memory,focus,andbehavior.Studiesshowthatpeopleindevelopedcountriesspendlesstimeasleepandmoretimeatworkorcommuting.Dr.KarineSpieg
3、el,attheUniversityofChicago,hasfoundthattheaveragelengthofsleephasgonedownfromninehoursanightin1910toseven-and-a-halfhoursanighttoday.However,ourbodiescannotfunctionwellwithoutenoughsleep.Losingjustoneortwohoursofsleepanight,overalongperiodoftime,cancauseser
4、ioushealthproblemsAccordingtoCanadianscientistDr.StanleyCoren,everyhouroflostsleepatnightcausesustoloseoneI.Q.pointthenextday.Forexample,whensomeonegetsonlyfiveorsixhoursofsleepeachnightforaweek,theperson’sI.Q.couldgodown15pointsormore.That’swhy,withoutenoug
5、hsleep,anormallyintelligentpersonmaystarttohavedifficultydoingdailytasks。Mostsleepexpertssaythathumansneedatleasteighthoursofsleepeveryday,butitshouldbeintwostages:alongsleepatnightandashorternapintheafternoon.Somecompanieshelptheiremployeesfollowthisadvice.
6、Theyallowthemto“powernap”intheafternoon,ifonlyfor20minutes。Theysaythismakestheworkersmuchmoreefficient.Tostudysleepdeprivation(notgettingenoughsleep),scientistsuseatestcalledtheMultipleSleepLatencyTest(MSLT).Duringthetest,apersonstaysinadarkened,quietroomdur
7、ingthedaytime.Scientistsbelievethatasleep-deprivedpersonwillfallasleepquickly.Ifittakestenminutesorlongertofallasleep,thepersonisprobablygettingenoughsleep.Scientistshavealsofoundthatthetimeofyearseemstoaffecthowmuchsleepweneed.Peopleusuallysleeplongerinthew
8、inter,sometimesasmuchas14hoursanight。However,inthesummer,peoplesometimessleepaslittleassixhours,withouthavinganyproblems.全文翻译：今天，我们听到越来越多的有关充足睡眠重要性的讨论，即每日保证8小时的睡：睡眠能有助于我们修复损伤并为我们的身体和大脑提供能量。医学专家认
