We should do sports every morning or every evening and often open windows to keep the air fresh. Wash our hands often,especially before meals and have healthy food and drink enough water every day. We shouldn't spit everywhere. If everyone has a good habit, we would keep fit. 我们应该每天早上或晚上做一些体育锻炼。我们也应该勤开窗通风，经常洗手，尤其饭前，并且吃健康食品，每天喝水。我们不应该随地吐痰。如果每个人都养成好习惯，我们就能保持健康。 Do you want to be healthy? Do morningexercises for half an hour or forty minutes every day. Wash your hands before each meal and open windows very often even though in winter. Fresh air is good for you. Don't spit everywhere. I have another idea. Don't overwork. Too much work will be bad for you. 你希望自己健康吗?每天进行半小时或四十分钟晨练吧。饭前洗手，经常开窗通风，即使在冬天也如此。新鲜空气对你会有好处。不要随地吐痰。 还有一个建议，不要过度工作。工作过度会对你有害。