【文章解读】本文为说明文。 蓝光是一种波长非常短、能量大的电磁辐射。 在某些情况下光会伤害我们的眼睛，但没有科学证据表明蓝光对我们的眼睛有害。 但是，很多人仍然认为蓝光是有害的。 这就是防蓝光眼镜如此受欢迎的原因。

[2021福建三明二模卷] wehumanslovetostareintooursmartdevices.wegazeforhours-about 10 hours and 39 minutes aday-atourcomputers，smars

buelightisatypeofelectromagneticradiationwithaveryshortwavelengththatproducesahighamountofenergy.while it & amp； #039； struethatlightcaacation ageoureyesundercertaincircumstances，there&amp； #039； snoscientificevidencesuggestingthatbluelightisharmfultooureyes.butmanypeoplestillthinkitis，whichiswhybluelightblockis

“everyoneisveryconcernedthatbluelightmaybecausingdamagetotheeye，butthere&amp； #039； snoevidencethatitmaybecausingseriousdamage，" Dr.Rahul Khurana，clinicalspokesmanfortheamericanacademyofophthalmology，tolole

bluelightexposureisnothingnew.infact，thesunisthelargestsourceofbluelight.moreover，buelightisalsopresentinledlights.blights #039； tharmful，thenwhyareweconstantlyrubbingoureyeswhenwe & amp； #039； relookingatour the answer is eyes train (眼睛疲劳) more than 60 percentofpeopleexperienceeyeproblemsassociatedwithdigitaleyestrain.and #039； t the cause.Instead，oureyesaresostrainedbecausemostofusblinklesswhenwestareatourdigitaldevices.soifeyestrainisthererealisssue

4.What do we know about blue light

A.It is a kind of nuclear radiation。

B.It has the shortest wavelength。

c.itmaycomefromelectronicdevices。

D.It consumes a great deal of energy .

5.whatcausesthepopularityofbluelightblockinglasses

a.evidenceoftheirbenefitstoeyes。

b.Beliefinbluelight&amp； #039； sHarmfuleffect

C.Widespread use of smart devices。

d.scientificunderstandingofbluelight。

6.whatcanbeinferredfromparagraph 4

a.bluelightexposureishardlyavoidable。

b.eyeproblemsarenoteasytodealwith。

c.bluelightmayconnectwithtiredeyes。

d.rubbingeyesmakespeoplestrained。

7.According to the text，wearingbluelightblockingglassesmaybe _ _ _。

A.tiring B.harmful

C.useless D.beneficialKeys CBAC