Parents, doctors and teachers want to know how to help children keep healthy. Here are five rules to keep healthy.

Eat different food

If you eat different food, you can get the nutrients (营养) your body needs. You have to eat two kinds of fruits and three kinds of vegetables a day.

Drink water often

When you’re really thirsty (口渴的), water is the No. I choice (选择). How much do kids need? If you are older than 12 years old, drink 3 cups a day.

Listen to your body

When you’re eating, notice (注意) how your body feels. Sometimes, people eat too much because they don’t notice when they need to stop eating. Eating too much can make you feel uncomfortable.

Limit (限制) screen time

What’s screen time? It’s the time you spend watching TV or using the computer. Try to spend at most two hours a day on the screen.

Be active (积极的)

What activities do you like best? Find ways to be active every day. You can write down lots of things to do, and then you can do them when your parents say it’s time to stop watching TV or playing computer games!

It was already 8:30 in the morning. Lin Tao, a 14-year-old schoolboy, still didn’t appear at school. He was often late for school! The teacher called his father and got to know he played computer games online late the night before and couldn’t get up that morning. In fact, he had played online games since the age of 11. He almost dropped out of school last year.

Lin Tao is not alone. Information from China Internet Center shows that the number of teenage Internet users in China had been about 170 million by the end of December, 2016. Many of them, like Lin Tao, spend too much time playing computer game online.

To deal with(解决) this problem, the Chinese government made a draft regulation (法规草案) in January this year. From the regulation, players need to use their own ID cards to play online games. Game companies (公司) will control teenagers’online game time. They will not be able to play online games between 12: 00 at night and 8: 00 in the morning. If they are still playing during the time, the game companies will lock(锁) them out. Many people think that the regulation can surely better help Chinese young game players online, while others are not sure whether it is useful. “More and more people come to know that playing online games too much not only brings teenagers healthy and study problems, but also makes them depressed (沮丧的) and lonely, “Tong Xiaojun, a director from a university, told CCTV. We need support from the whole society to solve the problem.”

【推荐3】Space vegetables are grown from seeds (种子) that have been taken to space and brought back to the earth. The seeds are influenced by the radiation (辐射) and low gravity in space. When they are brought back to the earth, these seeds produce vegetables that are bigger and healthier than normal vegetables. However, some people worry about eating space vegetables. They think that space vegetables might not be good for us and could make us get sick because of the radiation in space. However, people should not be frightened because space vegetables are very healthy.

Here are some facts that you should know about space vegetables. Space vegetables are grown from seeds that are carefully chosen. When seeds are brought back from space, they are tested to make sure that they will be safe to eat. Space vegetables are better for you than normal vegetables. For example, space tomatoes stay fresh for twenty days, which is one week longer than normal tomatoes.

After genetically modified (转基因) food appeared in the market, people worried that they were eating unknown things. For example, if nut genes (坚果基因) are put inside potatoes, people allergic to nuts might get sick from eating these potatoes because they do not know they are also eating nuts. Unlike genetically modified food, space vegetables have not been genetically changed. This means that no new genes are put into the vegetables. Therefore, there are no dangers of eating something unknown.

March 22 is World Water Day. It reminds us to save water, because water is the most important natural resource on the Earth.

Water covers more than 70% of the Earth’s surface, but most of that is sea water. People can’t use it directly in daily life. Fresh water takes up only 2.5% of the total water.

People in many places are facing serious water problems. One of them is water pollution. Many kinds of waste from cars, factories, farms and homes make rivers, lakes, and oceans dirty. Polluted water is very bad for people’s health. And dirty water is also bad for sea life. Now, 34% of fishes are dying out.

The biggest source (来源) of pollution comes from cars and factories. In the beginning, waste from cars and factories pollutes the air. Then, when it rains, the rain water comes down and makes our drinking water dirty.

Scientists say that in 30 years, more than half of the people in the world won’t have enough clean water. We have to learn how to save water. Here is some advice.

·Turn off the tap while you are brushing your teeth. You can save as much as 450 litres (升) of water each month.

·Leaky (漏水的) taps waste a lot of water. Fix them right away!

·You can easily cut your shower time short, and you’ll be still clean.

·When you wash the dishes, don’t let the water run.

·Only wash clothes when you have a lot to wash. If your washing machine isn’t full, you’re wasting water.

It’s very popular to travel in modern life. As travelers, we should try our best to protect the environment. Here’s what we can do to be a green traveler.

Make smarter flight choices

Air travel is not an environmentally-friendly way to travel because it uses a lot of energy. If you must fly, be sure to pack light to cut down the plane’s load(负担). And try to book an on-stop flight. Connecting flights usually require longer periods of flying and planes will use more energy.

Respect natural environment

Marked hiking trails(有指示标识的游览步道) are there usually to protect the natural environment and keep wild plants safe.

In beach areas, don’t use products that are harmful to the seawater and try to protect the ocean’s ecosystem.

Support locals directly

Buying handmade products and art pieces created by local people can help hand down cultural tradition and create jobs. Food that is grown locally and things that are sold by local families are often better and cheaper, all helping keep money in local pockets.

Find ways to give back

Consider the ways that you can help the local community and give back while traveling. This can be as simple as picking up litter in a park or volunteering to cleanup a beach. If you’re planning a trip where volunteering is your main goal, make sure you won’t take jobs away from local people.

Remember when you were a little child trying to learn to walk?

First, you had to learn how to balance yourself and stand. You fell down, and then got back up. You laughed sometimes and cried at other times. After much practice, you finally learned how to balance yourself. You got much pleasure from this new feeling of power---you’d stand everywhere you could. It was a happy time—you did it!

Now the next step—walking. You’d seen others do it. It didn’t look that hard---just move your legs while you were standing. Wrong---more difficult than you ever imagined. But after you tried again and again and again, you understood how to walk.

If people found you walking, they cheered, “Oh, look at what the kid is doing.” This encouraged you! But look back on those days when you were the little child—how many times did you try when no one was watching, or when no one was cheering? You couldn’t wait for someone to encourage you to take the next steps. You learned how to encourage yourself.

So, keep trying and encouraging yourself as you learned to walk if you want to succeed in doing something.

【推荐2】The flying car is a symbol of the future. It can be here soon! Companies are trying to make the flying car a real transportation choice. In cities, people get tired of being stuck in a traffic jam. They’ve dreamed about flying machines for many years.

People in Dubai are very lucky, because they can travel in the self-flying air taxi very soon. The egg-shaped air taxi, named the Ehang184, is made in China. It can travel for up to 30 minutes with a person that weighs up to 100kg. It can reach a top speed of 160 kilometers per hour. What’s more, it only takes two hours to charge the Ehang184 fully.

To call for a flying taxi, passengers need to enter their destinations (目的地) into a mobile app. The flying taxi then sets the flight plan and takes the passenger to his destination.

Dubai isn’t the first city to show an interest in using the flying car. New York City has started testing the flying car Transition for public use. Transition is a two-seat air plane that runs on gas. It can take off and land at the airports. It can also run on roads. Its wings fold up for ground use. They open up for flight. Sounds cool, right?

Thanks to modern technology, we’ll be able to use flying cars in the near future.

Every year, on the second Saturday in September, people celebrate World First Aid Day. It’s a day to raise awareness (意识) about how important first aid is. Technology not only makes our lives more convenient. it can also save lives. Let’s look at some technological inventions that are helping save lives.

Smart app

If someone needs first aid, even if you call an ambulance straight away, you may need to wait a while. There is often traffic on the roads. Some people in the US made an app called PulsePoint. It invites ordinary people trained in CPR (心肺复苏术) to use it. The app knows the users’ locations. If someone needs first aid nearby, a user will get a message asking them to help.

Magic gel

The gel (凝胶) called Vetigel is magic! It can stop someone bleeding in just 10 seconds, said the website Medical Device Network, The gel is made from plants. It can stick to a wound and help seal (密封) it. It was invented more than 10 years ago but was only allowed to be used on animals. Now in the US, it has been allowed to be used on humans, too. And get this: according to CGTN, the person from the US was only 17 years old when he invented it!

Flying aid

If people get injured or need help in hard-to-reach areas, drones (无人机) can be of great use. Because they can fly, drones can often offer help faster than people. And they can also make helping people safer for rescuers working in dangerous conditions. The drones can have a camera that can watch your health. They can also carry useful things, like blankets or a life vest (救生衣) to save someone from drowning (溺水).