Are you carrying too much on your back at school？You're not alone. Back experts（专家）in the USA are worried about that young students are having back and neck problems because they are carrying too much in their backpacks.

"It hurts my back when I run，"said Ebelin Reves，a student in Virginia. "It's hard to get up the stairs with my backpack because it's too heavy. "Students have to carry heavy backpacks on their backs for a whole week's study. Ebelin is one of them. They have regular（固定的）backpacks with two straps（带子）to carry them，but a number of students with heavy loads（负担）have switched to rolling backpacks. The backpacks have wheels and can roll on the ground. Shirley Park's backpack weighs 10 kilos，and she said，"I'll change to a rolling backpack because I am starting to have back pain."

How much is too much？Experts say that students should carry no more than 10%to 15%of their own body weight. A few students have had a good idea to lighten（减轻）the load: less homework.

Doctor's suggestions

（1）Lighten the load. Take home only the books the students need that day.

（2）Wide straps are better. They can send out weight over your shoulders（肩）and be sure to wear backpacks with two straps.

（3）The heaviest things should be packed closest to the back.

（4）Bend（弯曲）both knees when you pick up the pack，don't just bend over the waist（腰）

A mobile phone is used by almost everyone today. However, many people cannot get rid of (摆脱) mobile phones because phones have become part of daily life.

As the addiction (瘾) to the smartphone has become a serious problem, it causes many problems in life. Most phone users look down at their phones for a long time. When hunching (弓背) or bending their neck, they put serious pressure (压力) on the neck and backbone. And this will cause a sore back or a neck ache. According to studies, as high as 45% of the young people from age 16 to 24 these days suffer back pain because of the heavy usage of smartphones. Also, trying to focus on and look at the screen of the phone for a long time will discomfort eyes and may cause loss of vision (视力) . Besides, if someone brings the phone to sleep with, he or she will unconsciously (无意地) spend more time on the phone than sleep. It’s true that phones make life more convenient, but that doesn’t mean they can take control of life.

To get rid of phones, you can create a phone-free time. For example, turn off your phone or stop it from the Internet after 8:00 P. M. At that time, you can spend time on anything but phone so that you won’t check on your phone. Just like smoking, phone addiction is a habit. You must replace the habit with another if you want to change it. So find a few things to do whenever you are not using your phone, such as reading a book or exercising.

Of course, it’s not easy to get rid of a habit and the beginning is the most challenging. That’s why having a strong idea really makes a big difference. Remember, do not let your phone become your _________ and you become its servant (仆人) .

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D．

Primary and junior high school students in France will no longer be allowed to use mobile phones in school.

On Dec 10, France’s Education Minister (教育部长) Jean-Michel Blanquer said that mobile phones will be banned (禁止) from schools in France. This rule will go into effect (施行) in September 2018, the Guardian reported.

Children will be allowed to bring their phones to school, but will not be allowed to use them at any time until they leave school, even during breaks and lunch time. “These days, the children don’t play at break time anymore, they are just all in front of their smart phones and from an educational point of view that’s a problem,” Blanquer said, “More than 8 in 10 teenagers in France had smart phones in 2015, compared to 2 out of 10 in 2011.”

While some people have welcomed the ban, a great number of teachers, students and parents are questioning it.

Some schools plan to put all the students’ phones in one place and give them back at the end of school. But it’s not easy to do this.

Valérie Sipahimalani, the deputy head of a French teaching union, pointed out that many schools have no space to keep the phones and teachers don’t have the right to search students, the BBC noted.

As to some parents and students, they believe students should be allowed to use their mobile phones when there is dangerous situation.