写作思路：对保持健康的方法，提出自己的建议，从饮食以及运动说明。
正文：
We have only one chance to live in the world, so we must take good care of our bodies.
译文：我们只有一次机会生活在这个世界上，所以我们必须好好照顾我们的身体。
Here’s my advice about how to keep fit.
译文：这是我关于如何保持健康的建议。
Firstly，a balanced diet can help you to keep in good health.
译文：首先，均衡的饮食可以帮助你保持身体健康。
You’d better eat more health food.
译文：你最好吃更多的健康食品。
It's good for you to have a lot of vegetables, fruit and milk everyday.
译文：这是很好的，你要吃大量的蔬菜，水果和牛奶每天。
Secondly, you should do more exercise, such as playing ball games, running, swimming, and so on.
译文：其次，你应该做更多的运动，如打球，跑步，游泳，等等。
Thirdly, you need enough sleep.
译文：第三，你需要充足的睡眠。
It's really important.
译文：这是非常重要的。
What’s more, keep yourself happy.
译文：更重要的是，让自己心情愉快。
Try to smile every day.
译文：试着微笑面对每一天。
Please follow my good advice, everyone! I eagerly wish you fit and robust.
译文：每个人请按照我的建议来做，我热切地希望您身体健康和强壮。