李华因在学校使用手机被学校处分，他感到很困惑，写信给你求助。请根据以下提示给李华回信。所给要点必须写到外，自己可以适当补充相关细节。词数120左右（信的开头与结尾已给出，不计入总词数）
1: 手机的优点：联系方便
2: 带手机上学的问题：影响教学，花大量时间打手机有害学习和健康
Dear Li Hua,
Your letter reached me yesterday. It said in your letter that you were punished for using cellphones, which puzzled you.
Best wishes.
Yours,
Wang PingA possible version:
网友回答
(答案→)A possible version:
解析：本文属于半开放性提纲式书信体，英语写作是一种创作性的学习过程。启动知识信息储存，构思立意，谋篇布局，遣词造句，对语言表达的正确性和准确性、思维的逻辑性和文章的条理性都比口语要求更高。先审题，弄清写作要求，审题是写好作文的前提，理清思路，确定体裁、框架结构和内容。提醒考生注意时态及语态的使用。
【亮点说明】文中使用了非常好的短语和句子为文章增色不少，比如There is no doubt that cellphones can bring us much convenience., does harm to health, It said in your letter that you were punished for using cellphones, which puzzled you. It is right for school to prevent you from using cellphones还运用了which引导的定语从句等等。并注意了句子的衔接如： However；Besides等等。