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 sonic tofu every day because it's good for people,both the young and the old Milk is also necessary ,especially for women.So you should have milk twice a day.It can help you to be strong Next,doing more exercises is better.You can do morning exercises or evening exercises.After supper you should take a walk. Tofu is good for  _  .
young people old people young and old people students