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拾贝壳

      我一向喜欢贝壳，吵着要阿姨带我去拾贝壳，阿姨答应了。

      我们来到海边，啊，这里的景色真美，浪花轻轻拍打着海岸，发出“哗哗哗“的响声；蓝色的海面上航行着小小的帆船和”突突突“的汽艇。我望着无边无际的大海，心情十分舒畅。

      在海滩上，我们卷起裤管，俯下身子，拾起贝壳来。这里到处是五颜六色的贝壳：有大的、小的、尖的、圆的、扁的、各种形状、各种色泽，真实千奇百怪。它们在阳光下闪闪发光。忽然，阿姨叫道：“小红，快来，这个贝壳多好看！“我跑过去一看，果真是一个好贝壳，它有小碗那么大，身上印着一条一条棕色花纹，和老虎身上的花纹一样。我急忙接过来，掏出手帕，小心翼翼地把它包好。

      渐渐地，小篮子装满了贝壳，我们高高兴兴地准备回家。离开海滩时，我不时回过头去，啊！我爱美丽的贝壳，我爱金色的沙滩，我更爱祖国蓝色的海洋！

根据短文理解，选择正确答案。

About 70 million Americans are trying to lose weight. That is almost one out of three people in the USA. Some people go on diets. This means they eat less of certain food, especially fat and sugar. Other people exercise, take medicine, or even have operations. Losing weight is not easy, and it can also cost a lot of money.

    But why do so many people in the USA want to lose weight? Many people worry about not looking young and attractive. Other people worry about their health. Many doctors say being overweight is not healthy. Almost 30 million Americans weigh at least 20% more than their ideal (理想的)weight.

    In fact, the United States is the most overweight country in the world. Losing weight is hard work, but most people want to find a fast and easy way to take off fat. Bookstores sell lots of books, which tell readers how to lose weight. Each year, a large number of new books of this kind arc published. Each one promises to help people get rid of fat.

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