假定你是李华，正在一所英国学校学习暑期课程，遇到一些困难，希望得到学校辅导中心(Learning Center)的帮助。根据学校规定，你需书面预约，请按下列要点写一封信：1）本人简介,；2）求助内容；3）约定时间；4）你的联系方式(Email：lihua@1236 com；Phone：12345678)。

注意：1）词数l00左右； 2）可以适当增加细节，以使行文连贯；

Dear Sir/Madam,

    Look forward to your reply!

Yours,

Li Hua

一只蚂蚁从正方体ABCD﹣A₁B₁C₁D₁的顶点A处出发，经正方体的表面，按最短路线爬行到达顶点C₁位置，则下列图形中可以表示正方体及蚂蚁最短爬行路线的正视图是（　　）

    If you often feel tired and the doctor can't find anything wrong with you, you may be in a state of subhealth(亚健康). Subhealth is a state between health and illness. Most of the subhealthy people are middle-aged ones who are usually stressed out because of work and family. And some of them are students who are having exams.
    If you are subhealthy, it is not difficult for you to become well soon. You should have good living habits. For example, you should get up early and go to bed early. And you should exercise regularly（有规律地）. Exercising can keep you healthy. As for meals, it is better to eat less salt and sugar. Vegetables, fruit and fish are important to your body. You should eat more of them. It is not good to eat too much at one meal, because it may cause unhealthy changes in the digestive tract（消化道）. And at last, a balanced diet is very helpful in staying away from（远离）subhealth.