【答案解析】
Early rising does good to students in more than one way. It is known to everybody that air is never so fresh as in the early morning. By taking morning exercises in the fresh air, we can improve our health. Besides, early rising enables us to have enough time to plan our work better and get ready for the study of the day.
Late rising does harm to both our health and our study. Some students have already fallen into the habit of getting up late in the morning. They do not rise until the last minute for class. As a result, they often go to class on an empty stomach. They are always in such a hurry that they often miss a pen, or a notebook or even a textbook.
So, those late rises ought to make special efforts to get up early in the morning. It is true that bed habits die hard. Yet, as long as we try our best and do not give up halfway, I am sure that a strong will, good health and improved performance on study will be achieved.