When we think summer, most of us think of fun in the outdoors. So it seems easy to lose weight over the summer. In fact, though, it's quite possible for us to put on weight. The good news is that we can avoid these problems if we know what to pay attention to.

    Here are some ways to keep summer weight away.

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    When we don't have a plan, it's easy to spend summer moving from bed to the computer. So it is necessary to make a work or study plan, like learning a new skill or working at a job.

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    Because we don't have to go to school, it's easy to sleep late, watch too much TV and eat more snakes as usual. So it's necessary to make sure your summer days follow a schedule—getting up at the same time each day and eating meals as usual times.

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    Whenever you're free, find something special to do, like making a dinner for your family. But remember: limit your screen time, no more than two hours a day.

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    If it's too hot outside or you don't like going to a gym, you can do you exercise indoors. If you love being outdoors, try swimming, running or playing soccer in the early morning or evening. Anyway, don't let the heat stop your exercise plans.

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    Don't eat too much meat. Choose some fresh fruit. It's better to put your focus on talking with your family and friends, not on food. Also, don't eat too many frozen things like ice cream.

A. Beat the heat       B. Make a work or study plan         

C. Think about what to eat     D. Stay busy         

E. Put everything in a schedule

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

    First, you had to learn how to balance (平衡) 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.

My classmate Jane {#blank#}1{#/blank#}me something about her new friend Mike. She {#blank#}2{#/blank#}Mike can{#blank#}3{#/blank#}several languages and he likes{#blank#}4{#/blank#}with foreigners.

The human spine（脊柱） doesn't just help us stand up straight. Inside the spine is the spinal cord (脊髓) {#blank#}1{#/blank#} The legs and feet send "sense" information to the brain, saying they're hurt or hot, for example. And the brain sends messages to the lower body, telling the legs to walk, dance or sit down. 

When someone's spinal cord is hurt, information about senses doesn't reach the brain from the lower body. And control messages can't make it to the lower body from the brain. {#blank#}2{#/blank#}

Surprisingly, now scientists in Switzerland have given three paralyzed men the ability to walk again. All of the three men had damaged their spinal cords in motorcycle accidents and couldn't move their legs. To help them walk again, a special device (装置) was put directly on the lower part of their spinal cord. 

The scientists controlled the device from a computer. {#blank#}3{#/blank#} In the past, scientists have had some successes with the similar device in the lower spine. Some patients have even trained themselves over months to be able to walk. 

But this research is different. {#blank#}4{#/blank#}Instead, the computer tells the device to send "walking" messages. The scientists use computers to create patterns of movement—like taking a step—that work well with each patient. The patients then choose the pattern they want, and the muscles (肌肉) move in the chosen way. 

Over time, the three men are able to walk on their own, using a special walker with buttons to trigger (激发) each leg. {#blank#}5{#/blank#} The scientists are hopeful that in the future, this technology will allow more paralyzed people to walk again. 

Sanjiangyuan is home to the headwaters of the Yangtze,Yellow and Lancang rivers.In 2016,China began the pilot operation of Sanjiangyuan National Park.In October 2021,the government named Sanjiangyuan a national park:2023 marks the ;20th anniversary of Sanjiangyuan National Nature Reserve's setup.

Tsewang Gyaltsen,is an environmental protection worker in Qinghai province. He said,"Because of illegal mining(非法采矿)activities,a large part of our land was desertified(荒漠化).It is so harmful to the environment that it is hard to make it. green again"

The government,local people and social organizations have all worked hard and taken action to solve this problem.The government is continuing to improve the ecological(生态的)protection management system.The local people have also.make efforts to the environmental protection of Sanjiangyuan.They used to carry food with them in plastic bags and left the bags behind.But now they are regularly called on to pick up waste on the grasslands.The organizations Tsewang Gyaltsen has been working for is also devoted to organizing nature education.They often take teenagers to mountains and lakes to help them pay more attention to environmental protection.Thanks to these efforts,Sanjiangyuan is now green,vibrant and peaceful and a true heaven for wild animals."We hope more people can take part in the environmental protection of Sanjiangyuan and make it even better."Tsewang Gyaltsen said.