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1、时文阅读让黑夜遮住我们黑色的眼睛从最初只限于通讯，到如今与人们的衣食住行息息相关，手机在技术革新和社会发展的推动下，功能日渐强大起来，不管是生活、学习还是工作，它扮演的角色已无可替代。于是，人们对手机的依赖也愈发强烈，从早起到睡前，它总是形影不离。快节奏的生活已然让我们倍感压力，而黑夜里照亮我们面庞的那几寸光明，并不是智慧在闪耀，也并不能帮我们摆脱压力，反倒会影响睡眠，徒增焦虑，不如放下手机，让黑夜遮住我们黑色的眼睛。阅读短文并回答问题We’veallheardthesamewarning:lookingatyourphoneoranotherscreenbeforeb
2、edisverybadforyou.Itmaymakeitharderforyoutofallasleepandpreventyoufromgettingagoodnight’srest.Mostsleepdoctorssuggestturningoffscreensanhourbeforebedtime.Therealityisthat,forthemajorityofus,cellphones,tablets,orTVsarethelastthingswelookatbeforewecloseoureyes.Oursmartphonescansometimesfee
3、llikeanextensionofourbodiesbecausewe’resophysicallyconnectedtothem.Screensingeneralhavebecomesuchaprominentpartofourlivesthatitcanfeelcompletelyunrealistictoputthemawayearlierintheevening.Butaccordingtosleepdoctors,it’sasmartideatoatleastgiveitatry.Atnight,yourbrainstartstoproduceahormon
4、ecalledmelatonin（褪黑色素）,whichkeepsyourcircadianrhythm（生理节律）ontrackandhelpsyoufallasleep,accordingtotheNationalCenterforComplementaryandIntegrativeHealth.Beingexposedtobrightlightsuppressesmelatoninproduction,saysPhilipRichardGehrman,abehavioralsleepspecialistandassociateprofessorofclinica
5、lpsychologyinpsychiatryattheUniversityofPennsylvania’sPerelmanSchoolofMedicine.“Bluelighthasthestrongestimpact,”headds,“andthetypesofLEDlightsusedinmostelectronicdevicesarestrongestinthebluepartofthespectrum.”Whyisbluelightparticularlybad?Dr.Gehrmanexplainsthattheveryspecializedcellsinth
6、eeyesthatfeedintooursleepsystemandcircadianrhythms,calledretinalganglion（视网膜神经节）cells,respondstronglytobluelightincomparisontoothertypesoflight.“Beyondthelightyou’reexposingyourselfto,there’salsothesimpletruththatit’seasytogetcaughtupinwhatyou’rereadingorwatching,whichleadstostayingawake
7、alotlaterthanyoushould,”saysShelbyHarris,clinicalpsychologistinprivatepracticeinNewYork.“Evenifyou’vegottheself-controltoswitchoffNetflixafterareasonablenumberofepisodes,dependingonwhatyoujustwatchedorread,youmaybetoomentallystimulatedtofallasleepanyway.”1.Whichofthefollo
