这个教授有点逗

一般都是这样，可以先阅读他的论文，表示对你的研究很有参考价值并引用他的论文，恭维一下他的学术造诣和严谨的治学态度，再表示感谢！

Dear Smain,

First of all, thank you for your inspiration and good advice. Now I have finded attached papers related to artemisinin extraction for my interest attached, besides, I have carefully made specific modifications to cite the articles in my papers.
Best Regards

Huo，

I have read the attached pap ers