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。请根据以下结构提示给李华回信。开头结尾已给出。所给要点必须写到外，自己可以适当补充相关细节。字数：90----100。
Para 1: 手机的优点：联系方便
Para 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
Your letter reached me yesterday. You said in your letter that
It’s right for school to prevent you from using cellphones in school.A possible version:
网友回答
(答案→)A possible version:
解析：本文是关于手机的优缺点。要用一分为二的思想来叙述。既要肯定手机给我们带来的好处，又要指出手机的弊端。最后可以发表自己对于学生使用手机的看法。
开头可以先对问题有一个总的描述。
When it es to ..., most people believe that ..., but other people regard ...as ....
Some people contend that ... has proved to bring many advantages (disadvantages)
People, who advocate that ..., have their sound reasons (grounds)
Those who have already benefited from practicing it sing high praise of
To my point of view 。。。。。