Agoodnight’ssleepisimportanttoeveryoneofus.Asweknowsleephasalotofbenefits.*____36____Heartattacksandstrokesaremorecommonduringtheearlymorninghours.Thisfactmaybeexplainedbythewaysleepinteractswiththe

　　Agoodnight’ssleepisimportanttoeveryoneofus.Asweknowsleephasalotofbenefits.

　　*____36____Heartattacksandstrokesaremorecommonduringtheearlymorninghours.Thisfactmaybeexplainedbythewaysleepinteractswiththebloodvessels(血管).Lackofsleephasbeenassociatedwithworseningofbloodpressure.Yourheartwillbehealthierifyougetbetween7and9hoursofsleepeachnight.

　　*Sleepcanreducestress____37____Thebody’sfunctionsareputonhighalertwhichcausesanincreaseinbloodpressureandaproductionofstresshormones(荷尔蒙).Higherbloodpressureincreasesyourriskforheartattacksandstrokes.Thestresshormonesalsounfortunatelymakeitharderforyoutosleep.

　　*____38____Agoodnight’ssleepmakesyoufeelenergizedandalertthenextday.Beingengagedandactivenotonlyfeelsgreatitincreasesyourchancesforanothergoodnight’ssleep.Whenyouwakeupfeelingrefreshedusethatenergytogetoutintothedaylightdoactivethingsandbeengagedinyourworld.You’llsleepbetterthenextnightandincreaseyourdailyenergylevel.

　　*Sleepmayhelpyouloseweight.Researchershavealsofoundthatpeoplewhosleeplessthansevenhourspernightaremorelikelytobeoverweightorobese.____39____Soifyouareinterestedincontrollingorlosingweightdon’tforgettopayattentiontogettingagoodnight’ssleep.

　　*Sleephelpsthebodymakerepairs.Sleepisatimeforyourbodytorepairdamagecausedbystressraysandotherharmfulexposures.____40____Theseproteinmolecules(分子)formthebuildingblocksforcellsallowingthemtorepairdamage.

　　A.Sleepmakesyoumorealert.

　　B.Sleepimprovesyourmemory.

　　C.Sleepkeepsyourhearthealthy.

　　D.Yourcellsproducemoreproteinwhileyouaresleeping

　　E.Whenyourbodylackssleepitgoesintoastateofstress.

　　F.Asweknowthebodycandorepairworkitselfbeforethedamagebecomesworse.

　　G.Itisthoughtthatthelackofsleepimpactsthebalanceofhormonesinthebodythataffectappetite.