一篇任务型DidyousleepthedayawayonMarch21?WellyoushouldhavedonethatbecauseitwasWorldSleepingDay.Thisistheonedayoftheyearwhenpeoplearoundtheworldcareabouttheirsleepandaskthemselvesalotofquestionsaboutsle
一篇任务型DidyousleepthedayawayonMarch21?Well
youshouldhavedonethatbecauseitwasWorldSleepingDay.Thisistheonedayoftheyearwhenpeoplearoundtheworldcareabouttheirsleepandaskthemselvesalotofquestionsaboutsleep.
Whydoweneedsleep?Nobodyasyetcangiveaperfectanswertothisquestion.However,testshaveshownthatlack(缺少)ofsleepoveraboutfourweeksleadstoastrongdropinbodytemperature,greatweightlossandfinallysickness.
Differentpeopleneeddifferentamountsofsleep.Eighthoursanightisconsideredtheaverageamountofsleep.Forteenagerstheleastnumberofsleepinghoursadvisedbydoctorsaretenhoursforprimaryschoolstudents,nineforjuniorhighsandeightforseniorhighs.
Somepeopleseemtogetalongjustfinewithverylittlesleepatnight.LeadingAmericanscientistThomasEdisonsaidthatsleepwasawasteoftime.Hedid,however,takenapsduringtheday.Ontheotherhand.AlbertEinstein,anothergreatscientist,saidheneededatleasttenhours'sleepanight.
Herearesomeofthemostusefulsuggestions,foragoodnight'ssleep:
Gotobedatthesametime.
Useyourbedonlytosleep.
Don'texerciseintheevening.
Keepthebedroomdarkandquiet.
Drinkaglassofmilkbeforesleep.
Stoplookingatthewatchwhileyoucan'tsleep!