根据短文内容回答下面问题

It's important for us to be healthy. But how can we keep healthy? First, you should eat fruit and vegetables three or four times a week. Then eat some tofu every day because it's good for people, both the young and the old. Milk is also necessary (必要的), especially(尤其是) for women. So you should have milk twice a day. It can help you to be strong. Next, doing more exercise is better. You can do morning exercises or evening exercises. After supper you should take a walk.