英语作文 Shall we diet in order to keep fit?怎么写 快 会死人的

Your answer is well and concise, perhaps you can further elaborate from your points:
Balance diet: We need different source of nutrients to keep a healthy body. For instance: lack of iron can lead to anemia, lack of calcium put us at risk of having osteoporosis.

You may at risk of suffering aneroxia nervosa.
How do you define keep fit? Body frame or healthy body? From this point you can further explore the importance of keeping ur body healthy instead of having a fine feature (which the media mass keep=promoting the fact, slim = beauty)
Perhaps, instead of reducing the amount of food, I suggest alter the food that we ingest everyday. Taking low cholesterol diet and increase fibers intake---Protective against cardiovascular disease.

时间有限,我自己写了一段,希望能帮上你的忙
If you asked me:"Shall we diet in order to keep fit?" The answer is definitely no.I think going on a diet is not a good way to keep fit.As we all need nutrition everyday.We should have an adequate,balanced diet to support ourselves.Going on a diet is harmful to our health.For the sake of ourselves,we'd better not do that.There are many other ways to keep fit despite of dieting,such as doing exercises.Ecercising is a more effective method to loose weight and beautify our figures.We can do this instead of going on diet.After all,health is the most important thing.