1. Eat a lot of red fruits and vegetables

2. Stay outdoors more and do more physical activities

3. Use eye-drops when you sit up late or when you return from a dusty area

4. Don't read or study when there's not enough light

5. Eat less high-fat food

6. Eat enough calories

A. because it helps to make you fitter and more active.

B. to keep you from getting fat.

C. or you will become weak and tired.

D. because they provide vitamin A, which is good for the eyes.

E. to prevent your eyes from getting dry.

F. because it is harmful for your eyes.