假如你是张静，你的朋友Jenny发电子邮件向你询问你们学校的校规，请你根据以下提示给他回复邮件来介绍你们学校的校规。

提示：  1）在校必须穿校服，衣服干净整洁。

2）不许迟到、早退。

3）不准从楼上向下扔杂物。

4）玩耍时不能使用刀等尖锐的物品。（尖锐的：sharp）

5）在校不扎耳洞、不戴耳环、不抽烟、不喝酒。

要求：词数80词左右，开头结尾已给出，不计入总词数。

Dear Jenny,                                                                    

I'm glad to get your email. In the email, you asked me about my school rules. Here I will tell you about them.                                             

That's all. What about yours?                                                     

                                                                 Yours,               

                                                              Zhang Jing