阅读下列材料：

材料一：水旱从人，不知饥馑，时无荒年，天下谓之天府也──《华阳国志•蜀志》

材料二：（见图1）

材料三：（如图2所示）

始知李太守，伯禹亦不如。──李白

请回答：

    There is an old English saying. It tells us that we must go to bed early and get up early in the morning. Then we shall be healthy. We shall also be rich and clever. This is true. The body must have enough sleep to be healthy. Children of young age should have ten hours' sleep every night. Children who do not have enough sleep cannot do their work well and they may not be healthy.

    The body also needs exercise. Walking, running, jumping and playing games are all exercise. Exercise keeps the body strong.

    Exercise also helps the blood to move around inside the body. It is very important. Our blood moves to all parts of our body. The head also needs blood. Exercise helps us to think better.