结合材料，运用认识论的相关知识，说明我们党对市场在资源配置中地位、作用认识的合理性。

如图，正方形ABCD中，AB=6，点E在边CD上，且CD=3DE．将△ADE沿AE对折至△AFE，延长EF交边BC于点G，连接AG、CF．下列结论：①△ABG≌△AFG；②BG=GC；③AG∥CF；④S_△FGC=3．其中正确结论的个数是（　　）

    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.