第1个回答 2016-02-22
Dear Jack,
I heard that you have been staying up late at night to study. This is a bad habit. Staying up is not good for your health, because it causes more eye strain. It also hurts your back. It is better to sleep at night and to study during the day. If you stay up late, you will be tired and less energetic the next day. Please consider my recommendation carefully.
Sincerely,
Hua Li本回答被提问者和网友采纳