Even a little exercise can make you think less anxiously. Studies have shown that any amount of exercise, from a brisk 10?minute walk to an intense aerobics or weightlifting session seems to decrease feelings of anxiety. Working out regularly may make you smarter now and lessen the possibility that you’ll lose brain function as you age. According to a recent animal study at the University of Illinois, exercise can actually help the brain develop new cells. In several studies, regular weight training or aerobic exercise was shown to improve the quality and duration of sleep.

　　Naturally, this can make you less fatigued and be able to function better during the day. Like meditation, hobbies or any other leisure activity, exercise gives your mind a needed break from everyday thoughts, responsibilities and commitments. Finally, there’s one more reason to keep exercising. When you work out regularly, your body simply functions better — you are better, healthier and less likely to suffer painful physical conditions. And that just plain feels good.

As far as I am concerned, the beauty of knowledge can be explained in three aspects. 　　Firstly, knowledge is open to all human beings. People can learn whatever they wish in one way or another. Secondly, knowledge learnt can be reflected in one's later life, so that one knows how to savor the present moment in peaceful times and how to deal with problems in difficult times. Last but not least, one of the most prominent features of knowledge is that one carries it throughout his life. Even if one loses a large fortune, he will never be a beggar if he already knows how to make money. 　　

To sum up, knowledge is of great importance in one's lifetime. It is advisable that one should learn the beauty of knowledge and enjoy the process of learning.

Once upon a time， there was a king who had a daughter as beautiful as a blooming rose. To all the suitors who came to the king's palace to ask for the hand of the princess, the old king assigned three tasks to be accomplished, each next to impossible. One day, into the king's palace came a handsome young prince…" Well, you know the rest. The three tasks may be different in different versions, but the main plot is always the same, with the prince claiming the princess's hand triumphantly