近年来，学生意外伤害事故频发，给许多家庭带来永久的伤痛．作为中学生，我们该如何有效的自我保护，免受伤害呢？我市正在举行以"How to Keep Safe"为题的中学生安全知识英语征文比赛，请你根据下表提示，写一篇短文参赛吧．

How to Keep Safe
Traffic	traffic lights，electric bikes（电动车）…
Swimming	rivers，swimming pool…
Internet	ID number，code（密码），unhealthy websites…
…	…

要求：

1．短文必须包含提示中所有内容，并适当发挥；

2．语句通顺，意思连贯，语法正确，书写规范；

3．文中不得出现真实人名、校名或地名；

4．词数：80﹣100（开头和结尾已给出，不计入总词数）．

How to Keep safe

Do you know that many dangerous things will happen if we are not careful enough？ As a student， how to keep safe is very important．

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   After all， life is very important． We should learn something about self﹣protection so that we can protect ourselves well．