北京仁爱国际英语学校八年级学生魏环境向福州的网友李志愿发了一封电子邮件，询问了一些情况。请根据来信帮他回一封电子邮件。
     注意：1. 词数：60词左右；
                 2. 邮件的开头和结尾已替你写好，不计入总词数。
Receiver：Li Zhiyuan@163. com
Subject：How to protect the clean water?
Dear Li Zhiyuan, I feel very excited about my visit to Fuzhou and meeting you for the first time! But I’m still not sure about the following questions:1. Are there any rivers or lakes in your city? 2. Is the water dirty or clean? Why? 3. Did you do anything useful to protect the clean water? Please let me know. 
                                                                                                                                         Your friend，  
                                                                                                                                         Wei Huanjing  
Dear Wei Huanjing，
       I am very excited to receive your e-mail.  I am interested in your questions. _________________________________________________________________________________________________________________________________________________________________________________     
Looking forward to meeting you soon.
                                                                                                                                               Yours, 
                                                                                                                                             Li Zhiyuan