邮件内容：

Dear boss,

Sorry for replying you right before the deadline. Thank you very much for spending your precious Friday evening personal time to help me change my slides. I have finshed my changes based on your comment on Saturday. However, I cannot fall asleep Sunday evening as these excellent comments from your email make me keep thinking whether my changes are good enough. And finally I waked up around 3 a.m. Monday and started to rewrite my slides from scratch again based on my final understanding of your comments. Luckily i finished it right before 8 a.m.

And i feel very sick now as i did not sleep much last night and i am in the hospital now. the doctor said i probably need to rest for 5 days as my health condition is very bad.

All the best.