1.Referringtoaninvestigation,itisacommonphenomenonthatstudentsareweak,myopicandeasytofaint.

2.Societydeveloping,thepressureonthemincreasing,classesmoreandlastinglonger,thestudentsstayinguplatedoinghomeworkmorefrequently,remarkablydecreaseoftheirhealthisnothingnew.(你说不要简单句式，我就用一大堆独立主格结构）

3.Forthepurposeoftheadvancementofthehealthlevelofstudents,Irecommendthattheyincreasetheirparticipationinsportsafterschool.

4.Themainideaofthearticleisthatpeoplearesupposedtodophysicalexercisestodecreasetheriskoffallingsick;otherwise,theywillbequitevulnerable.

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