Do you have a mobile phone? Do you send text messages to your friends and family?

Text messaging or “texting” is becoming very p__1__. But scientists have p__2__ that texting can give us problems with our h__3__. Be careful! Too much texting can cause RSI (Repetitive Strain Injury) in our thumbs (大拇指) and wrists (腕关节). We spoke to a doctor called Harriet Wilson, who treats many patients with RSI. She says if we spend more than 10-15 minutes texting each time, we could have p__4__ in the future.

Dr. Harjeet Deepa, who treats RSI patients, said that the y__5__ patient she had treated was a 5-year-old girl. She had s__6__ bad RSI in her hands that she couldn’t hold a pencil.

As mobile phones d__7__, they are getting smaller with buttons c__8__ together. Texting with a smaller phone is worse than using a larger phone with b__9__ buttons. Using computers and playing video games can cause the same problem. So more and more people could find t__10_ with RSI.

Many university students and teenagers have RSI. If we don’t do anything about this, too many young people could grow up in terrible pain.

西北地区房子“半边盖”还有利于（）。

A.保暖

B.美观

C.防沙尘

D.收集雨水