回复教授邮件时，应当注意以下几个要点：
称呼
使用恰当的称呼，如“Dear Professor [姓氏]”或“Dear Dr. [姓氏]”，如果不确定具体称谓，可以使用“To whom it may concern”。
邮件主题
主题行应清晰、精准地表达邮件的目的，便于教授一目了然。可以使用“课程号+section+正文主题”的格式，例如：“MATH101 Section 1: Inquiry about Exam Format”。
正文开头
开门见山地表明邮件目的，使用“I am writing to inquire about…”或“I would like to seek your guidance on…”等句型，直接说明来意。
背景信息
提供必要的背景信息，帮助教授回忆之前的沟通内容，避免重复查找资料。例如，“As discussed in our last meeting…”或“Following up on my previous email sent on [date]…”。
问题或需求
清晰、条理地列出问题或需求，便于教授快速理解并作出回应。保持简洁明了，避免冗长和复杂的表述。
感谢与期待
在邮件结尾处表达感谢，并期待教授的回复。可以使用“Thank you for your time and guidance”或“I look forward to your response”。
落款
使用正式的落款，如“Sincerely, [你的名字]”或“Kind regards, [你的名字]”。
```
Subject: Inquiry about Project Submission Deadlines
Dear Professor [姓氏],
I hope this email finds you well. I am writing to inquire about the project submission deadlines for the course [课程号]. Specifically, I would like to know the exact dates by which we need to submit our final reports.
As discussed in our last meeting, we were encouraged to finalize our projects by [具体日期]. However, I want to ensure that I am on track to meet this deadline. Could you please confirm the submission schedule and provide any additional guidance if necessary？
Thank you for your time and guidance. I am looking forward to your response.
Sincerely,
[你的名字]
```
通过遵循以上要点，你的邮件将显得专业、清晰且有效，有助于教授快速理解你的需求并给予回复。