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  Whichpartoftheworldhasthemostnearsightedstudents?Justlookaroundyou–it’sEastAsia.NineintenschoolleaversinmajorEastAsiancitiesarenearsighted,accordingtotheBBC.Expertssaybooksandvideogamesarenottoblame

  Whichpartoftheworldhasthemostnearsightedstudents?Justlookaroundyou–it’sEastAsia.NineintenschoolleaversinmajorEastAsiancitiesarenearsighted,accordingtotheBBC.Expertssaybooksandvideogamesarenottoblame.EastAsianstudents,theysay,aren’tgettingenoughsunlight.

  Peoplebecomenearsightedbecausetheireyeballsgrowoutofshapeandlightenteringtheireyescannotfocuscorrectly.Thebodycanproduceachemicalcalleddopamine(多巴胺)tostopeyeballsfromchangingshape.Andguesswhatscientistshavejustdiscovered?Sunlightcanhelpourbodiesproducemoredopamine,reportedAFP.

  Accordingtothestudy,primaryschoolstudentsinSingaporespendonly30minutesoutdoorseveryday;inAustralia,bycontrast,kidsspendaboutthreehoursadayoutside.Asaresult,fewerchildreninAustraliaarenearsighted–only10percent,comparedwith90percentinSingapore.

  “ChildreninEastAsiabasicallygotoschool...gohomeandstayinside.Theystudyandtheywatchtelevision,”IanMorganoftheAustralianNationalUniversitytoldAFP.

  Butbeingabookwormoracouchpotatodoesnotdirectlyharmtheeyes,addedMorgan.“Aslongastheygetoutside,itdoesn’tseemtomatterhowmuchstudytheydo,”heexplained.“Therearesomekidswhostudyhardandgetoutsideandplayhardandtheyaregenerallyfine.Theoneswhoareatmajorriskaretheoneswhostudyhardanddon’tgetoutside.Asaresultofmassive(巨大的)educationalpressuresandtheconstruction(构成)ofachild’sday,theamountoftimetheyspendoutsideinbrightlightisminimized.”

  Expertssuggestchildrenshouldstayoutsidefortwotothreehourseveryday.Thiscanincludetimespentintheplaygroundandwalkingtoandfromschool.

  小题1:Whichofthewordhasthesimilarmeaningastheunderlinedphrase“nineinten”?A.manyB.fewC.someD.most小题2:WhatisthemainreasonforthelargenumberofnearsightedstudentsinEastAsia,accordingtoscientists?A.Toomuchreadingorgaming.B.Lack(缺少)ofsunlight.C.Geneticreasons.D.Lackofexercise.小题3:WhatcanweconcludefromParagraph2?A.Dopaminei

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2020-10-21 02:41
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沈祖樑

  小题1:D小题2:B小题3:C小题4:D试题解析:本文大意:根据BBC报道在东亚的主要大城市中有十分之九的毕业生是近视眼,专家说书本和视频没有责任,他们没有获得足够的阳光。AFP报道阳光可以帮...

2020-10-21 02:43:07

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