1、 快餐在中国十分流行，它是现代快节奏社会的最佳反应，并分析快餐受欢迎的原因;

　　2、 然而，从营养角度来讲，快餐却差强人意;

　　3、 对快餐还是以偶尔品尝为宜。

参考范文：

Fast Food

In present-day China, fast food is so popular, especially among children and teenagers, that it can be seen in every big and medium-sized city. It's even difficult to think of any other single thing that represents the fast pace of modern society in the way that fast food does. Some people think it is very convenient and saves a lot of time. The trends of modern society seem to all point to one ultimate goal—saving time, and fast food well serves this purpose. In their opinions, its popularity is also attributed to the restaurants' clean and cozy environment, excellent service, and guaranteed quality of food and drinks.

However, others maintain that fast food is usually low in nutrition and can't be regarded as a balanced diet. For example, doctors suggest that people, especially children, eat fast food as little as possible. Besides, although cooking at home is time-consuming and the following washing-up tiresome, it offers healthy and delicious meals your body needs and likes.

As far as I'm concerned, fast food is not my best choice. For one thing, I prefer traditional spicy Chinese food. For another, being engaged in the work all day, I may spend one or two hours to prepare my favorite dishes to ensure myself a nice rest. As a result, fast food is only a good choice when I am in a hurry and resort to it once in a while.