背景资料： 近年来，各种媒体相继报导校园内外发生的伤害事故，引起社会各界的广泛关注。给人的感觉是中小学生发生的伤害事故越来越多，父母向学校索赔的数额越来越大，学校不堪重负。有的学校采取消极回避的做法，减少活动，甚至不许学生在校园踢足球。这样形成了与教育目的 Background Information: In recent years, various kinds of media have successively reported the injuries that occurred inside and outside the campus, causing widespread concern in the community. The impression is that more and more primary and secondary school students have been injured, parents claim more and more schools, schools overwhelmed. Some schools adopt negative avoidance practices, reduce activities and even prohibit students from playing football on campus. This formed and educational purposes