PThere are piles of homework, the pressure of examinations, and loads of delicate things thatcomplex affair distract me all make itfeel life a burden for me. There are piles of homework, the pressure of examinations, and loads of complex affair distract me all feel life a burden.

COMMENT: I often feel this way. Once or twice I meditate for 20-30 minutes. (这感觉就像一个"精神浴"，然后我感觉更清晰。)

I am like a dropbut a mere drop of water in the deep sea. I am but a mere drop of water in the deep sea.

I amfeel like like a drop in thea vast sea. I feel like like a drop in a vast sea.

DoPlease answer my letter ASAP. Please answer my letter ASAP.

If you want to be extremely forceful, then "Do" is completely correct. But I personally would never write in that tone.

Do answer my letter ASAP.(If you are writing a *letter* to someone, this is possible.) (If you are writing a *letter* to someone, this is possible.)

My Ddear Ffriends: , I am anxious to hear from you all. My dear friends, I am anxious to hear from you all.

For the punctuation of English-language letters, you can look this this webpage from the University of Sussex: https://www.sussex.ac.uk/informatics/punctuation/essaysandletters/letters.

OPTION A: My Dear Friends: I am anxious, I am looking forward to hearing from you all.all of you. OPTION B: Dear Friends: I am looking forward to exchanging ideas with all of you. OPTION A: My Dear Friends, I am looking forward to hearing from all of you. OPTION B: Dear Friends: I am looking forward to exchanging ideas with all of you.

In some parts of the USA, the phrase "you all" is used. In standard English, the phrase "all of you" is more common.

LALSO POSSIBLE: My life here isn't as fun bed of roses, as it may seem to youon the surface. ALSO POSSIBLE: My life here isn't a bed of roses, as it may seem on the surface.

IDIOM: a bed of roses → https://dictionary.cambridge.org/dictionary/english-chinese-simplified/bed-of-roses