题目内容：

Blood donation, is a wonderful thing to do. It is an easy and direct way to help social work. It helps those people in need of blood.

You are able to give or donate blood every three or four months. Blood donation is not a big problem, but you need to keep a few points in mind.

Before donating blood, you should have a healthy diet. Do not go for it on an empty stomach. After having a balanced diet, you will feel strong and comfortable to donate blood. Then you will not feel sick or weak.

For a good blood flow in your body, you’d better drink at least 6 glasses of water every day. Completely avoid taking alcohol (酒) and smoking a day before and after giving blood.

When you are going for blood donation, be relaxed. During the blood donation activity, take a deep breath and try to calm yourself. Don’t join in some other activities.

After donating blood, the following tips can help you. Take a rest for 15 minutes after the donation. It helps you to feel relaxed. Eat something and drink juice before leaving the blood donation centre.

Finally, be proud of yourself because you have done a great thing to save other’s life.

回答下面五个问题，每题答案不超过六个词。

1.How often can you donate blood?                   ______________________________

2.What should you have before donating blood?         ______________________________

3.How much water do you need to drink every day?      ______________________________

4.What should you avoid before and after the donation?   ______________________________

5.How long should you take a rest after the donation?    ______________________________