As it's know to all,health is to us what water is to fish.In my opinion,health is the important thing in our life.For examper,if we don't have good health ,we can't enjoy our life .on the contrary,if we have good health ,we can do many things and make our life full of wonder.So we must keep good health.Now,you may wonder how to keep health.First,we should do exercise.In my eyes ,this is the most important.Second,we ought to have healthy food,but not junk food.Third,we also should own a good mood.In a word,let's spare no efford to keep health and have good life.