問題詳情

（V）閱讀測驗（40%） (1) Cracked and worn-down teeth, jaw pain and headaches are getting the attention of dentists—and stress is at the root of theproblem. “We know that everybody’s under a lot of stress lately,” said Matthew Messina, a dentist and adviser for the AmericanDental Association. The body reacts to stress—whether real or perceived—with a spurt of energy that enables a person to run or fight,Messina said. People who are under stress burn that excess energy off somewhere. Some do it at night by clenching or grinding theirteeth.   Clenching and grinding, also called “bruxism,” puts hundreds of pounds of pressure on tooth surfaces. Typically, chewing exerts20 to 40 pounds on the teeth, but the pressure from grinding can be 250 pounds or more. Broken and chipped teeth are some of theresults. And grinding can wear off the white shiny substance covering the teeth until the softer bony layer of the teeth is exposed.Teeth also can be rubbed flat. Wear and tear on teeth isn’t the only result. “When you clench your teeth, you can get pain behind theeyes, ringing in the ears, sinus pain, neck pain, headaches--it can even trigger migraines,” said David Wright, a dentist who has training for the treatment of facial and joint pain. Breaking a clench-and-grind habit isn’t easy. Stress management techniques canhelp some patients. But there’s more to solving the problem than just telling a patient to relax and expecting everything to be all right,dentists say.    Many patients try over-the-counter night (mouth) guards that prevent teeth from snapping together and allow muscles to relax.But the one-size-fits-all devices often don’t work well, dentists say. What works better are custom-made appliances that fit thepatient’s mouth.
56. The article is mainly about ______.
(A) how to take care of your worn-down teeth
(B) how to break a clench-and-grind habit
(C) how to prevent damage caused by teeth grinding
(D) how being stressed out can affect your teeth

參考答案

答案：D
難度：非常困難0
統計：A(0),B(0),C(0),D(0),E(0)

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