Dear Li Hua,
I am glad to hear from you yesterday. As your close friend, I’d like to talk about the harm of Internet addiction to you.
As we know, the Internet is a convenient tool to improve our knowledge and skills. However, our life will be greatly affected if we are addicted to it. I feel worried to know that you have wasted lots of valuable time playing the Internet games. Now your grades are going down and your health is going from bad to worse. To make things worse, it has damaged the relationship with your friends and family. So I think it is high time that you got rid of the bad habit. It is a good idea for you to read some meaningful books and do some physical exercise. Good luck!
I am looking forward to hearing your good news soon.
Yours truly,
这是一封劝告信。。“劝告信”是书信的一种，属于应用文文体。“劝告信”的主要写作特点是表达得体、简洁，让人能够愉快地接受。
要想写好一封“劝告信”，通常有以下几个步骤：
1. 发现问题 (discovering the problems)
收到对方的来信后，首先要仔细阅读信件，以发现信中提到的问题。
2. 分析问题 (analyzing the problems)
发现问题之后，我们紧接着就要分析问题。
3. 提出劝告 (offering practical advice)
在发现和分析问题之后，接下来就要“对症下药”。