[参考范文]A recent survey shows that the health of the students in our school has been going from bad to worse in the past three The number of short-sighted students has increased from 77% in 2010 to 5% in 2013， while that of overweight students from 38% to 2% Nearly 15% more students don’t have enough sleep because of more Besides， over 21% more students become mentally It seems to me that the reasons for this lie in heavier burden of study and more homework， thus making students unable to spare any time to take exercise or have enough To improve students’ health， we call for less Only in this way can students get plenty of sleep and be more Proper diets and exercise should also be paid attention to so that they won’t easily put on With their heavy burdens removed， students can then keep in normal mental
