Your advice has been very valuable, and I have read the books recommended by you with gratifying results. I have finished my research paper, and I owe it to your help. I would like to express my gratitude, along with my best wishes.
Respectful Yours, Amelia
点评：本类的主要思路是：感谢对方的帮助（或简述对方帮助的内容，即写作目的），紧接着简述对方如何帮助到了自己，自己的收获是什么，最后还是不要忘记再次感谢或者“谨以美好祝愿”等表示祝福的词语结束全文。