第一段概括写出写信的大致内容：I am writing here to provide some advice to improve......\You have asked me for my advice concerning/with regard to......
第二段详述具体的建议，可分条阐述：To begin with,......Besides,......Moreover,......
第三段总结段：I hope you will find these suggestions useful and I would be ready to discuss this matter with you to further details. I am looking forward to your reply and wish you a good work.
To whom It May Concern,(解释为相关负责人)
As a ……, I would like to take the opportunity to express my appreciation for your kind assistance as always. Meanwhile, I feel that it would be beneficial to express my views concerning…….
In the first place, ……. I would also recommend …….Last but not least, …….
I hope that you take my suggestions into serious consideration.
I am very glad to hear that you want to seek some suggestions about
______ in order to ______ .
From my pointof view, ______ . Also, to you, I highly recommend that ______ . On the one hand,______ . On the other hand, ______ . Besides, it is unnecessary for you to______ . Consequently, I believe that ______ .
I hope that my opinions are of help to you, and please feel free to contact me for more questions.
I am writing to express my views concerning ______ . In the first place, I would like to say thank you for the help and everything else you have been offering to us. Meanwhile, I also want to make some advice to better______ .
Firstly, we have found that ______ . Secondly, we want to______ . Finally, we hope that ______ .
I am looking forwards to your consideration about my proposals. Thanks in advance for that.