【正确答案】Dear Miss Wang,
I am writing to thank you for ^[1] your great help in my preparation for the job interview. Thanks to your kind help, I got this job.
Before the job interview, you have given me some good advice that is quite beneficial. ^[2] To begin with, you told me to dress properly so as to leave a good first impression on the interviewer. What's more, you advised me to make sufficient preparation for the possible questions in the interview so that I could speak clearly and fluently as well. Last but not least, you emphasized that self-confidence was of vital importance, which could help me bring my capacity into full play.^[3]
Thanks a lot for your kindness and your patience. ^[4] I wish you all the best in your future life and work.
Yours sincerely,
Li Ming

【答案解析】[1] 感谢信开头的常用表达，还可以用I am writing to express my sincere thanks for...表述。
[2] 第一句Before the...is quite beneficial是第二段的主题句，之后分三个方面讲述了老师对自己的帮助。本段中运用To begin with、What's more和Last but not least来衔接这三个层面，使本段内容层次清晰、易懂。
[3] which could... into full play是非限制性定语从句，补充说明前一句的内容。bring sth. into play 意为“使某事物发生作用”。
[4] 客气用语，表达对对方的感谢。
[参考译文]
亲爱的王老师：
我写信给您，感谢您在我的面试准备中给予的极大帮助。由于您的热心帮助，我得到了这份工作。
在面试之前，您给我提供了一些好的建议，这让我受益匪浅。首先，您告诉我着装要得体，这会给面试官留下良好的第一印象。其次，您建议我对面试中可能被问到的问题做好充分的准备，这样我就可以清晰、流利地回答这些问题。最后您强调自信是非常重要的，它有助于充分发挥我的才能。
再次感谢您的热情和耐心帮助。祝您在未来的生活和工作中一切顺利。
诚挚的，
李明