根據最近的一則報道，我國中小學生的書包超重現象十分嚴重。小學生書包平均重量為3.5公斤，而初中生則為5.5公斤。請根據這一現象，按照以下要點寫一篇80詞左右的英語短文。文章的開頭已經給出，不計入總詞數。

　　要點：
　　1.簡單描述：學生背著重重的書包去上學……
　　2.分析原因：課外班、課本、作業、測試……
　　3.提出建議：減少課本、作業……
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　　參考范文
　　It is reported that students in our country have a problem with their schoolbag weight. Most students have very heavy schoolbags. For the average primary school kid, his or her school bag weighs 3.5kg, while an average middle school student’s weighs 5.5kg.
　　The reason why their schoolbags are so heavy is that their school workload is equally heavy. On top of a large amount of homework, students also have to take a lot of extra classes and study hard for tests. All this work means that the books, test papers and exercise books pile up and make their schoolbags very heavy indeed.
　　In my opinion, schools and parents should work together to assign students less homework. If so, they’ll finally be able to carry their bags with ease.

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