Dear Jisoo,

I'm glad to receive your letter! I know that keeping fit and staying healthy are the goals of everyone.

Health is the most important thing we need. When we have good health we can do a lot of things which makes our life better. If we know how to keep fit and stay healthy, we will have good health.There are some common ways that help us keep fit and stay healthy.Firstly, you should eat and drink in moderation. It’s true that eating and drinking enough can provide you with enough energy and protein, but eatingand drinking too much can cause common diseases such as stomachache, obesity. There is also a saying that: “Eat to live,not live to eat.” Of course, eating and drinking too little can cause energy shortage and make you tired or sick easily.Secondly,you should exercise every day. Doctors say that regular exercise can help reduce stress, burn excessive energy and strengthen bones and muscles.Recent surveys show that over 90 percent (%) of people doing exercise regularly have good body shape, always feel healthy and rarely catch diseases.Thirdly, we should have enough sleep every day. Doctors advise us that children under ten years old should sleep at least 12 hours a day, and older people should sleep for 7 hours a day. And doctors say that bad sleep or shortage of sleep can cause stress and terrible headaches.Last but not least, being happy and optimistic is very good for your health. There is a saying that “a laughter is the best medicine” Many doctors say that being happy and optimistic in a second and make you live ten years longer.I hope that with the above information can bring you good health and healthy lifestyle.

Your friend,

   Jenny