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Bad teeth can be painful—and worse. They can even be deadly. Infections of the gums and teeth can release bacteria into the bloo
Bad teeth can be painful—and worse. They can even be deadly. Infections of the gums and teeth can release bacteria into the bloo
admin
2013-03-11
18
问题
Bad teeth can be painful—and worse. They can even be deadly. Infections of the gums and teeth can release bacteria into the blood system. Those bacteria can increase the chances of a heart attack or stroke and worsen the effects of other diseases. And adults are not the only ones at risk. For example, in 2007, doctors in the Washington area said a boy died when a tooth infection spread to his brain. They said it might have been prevented had he received the dental care he needed. He was 12 years old.
Experts at the National Institutes of Health say good dental care starts at birth. Breast milk, they say, is the best food for the healthy development of teeth. Breast milk can help slow bacterial growth and acid production in the mouth. But dentists say a baby’s gums and early teeth should be cleaned after each feeding. Use a cloth with a little warm water. Experts say if you decide to put your baby to sleep with a bottle, only give the child water.
When baby teeth begin to appear, you can clean them with a wet toothbrush. Dentists say it is important to find soft toothbrushes made especially for babies and to use them very gently. The use of fluoride (氟化物) to protect teeth is common in many parts of the world. For example, it is often added to drinking water supplies. The fluoride mixes with hard surface on teeth, to help prevent holes from forming.
But young children often swallow toothpaste when they brush. The American Academy of Pediatric Dentistry notes that swallowing fluoridated toothpaste can cause problems. So young children should be carefully supervised when they brush their teeth. And only a small amount of fluoridated toothpaste, the size of a pea, should be used.
The American Academy of Family Physicians says most children stop sucking their thumb by the age of four. If it continues, the group advises parents to talk to their child’s dentist or doctor. It could interfere with the correct development of permanent teeth.
Dentists say children should have their first dental visit at least by the time they are one year old. They say babies should be examined when their first teeth appear—usually at around six months.
Children continuing sucking their thumb by the age of four could______.
选项
A、make their parents visit physicians and dentists
B、stop sucking their thumb after having a dental visit
C、hinder the correct development of permanent teeth
D、have a healthy teeth development when they grow up
答案
C
解析
事实细节题。根据定位句,如果孩子四岁之后仍吮吸大拇指,美国家庭医师研究院建议父母应该与孩子的牙医或医生沟通。因为这可能影响孩子永久齿的正常发育。解答本题,关键是理解it指代的内容是孩子吮吸大拇指。C)含义与之吻合,故为答案。原文指出孩子四岁后仍吮吸大拇指的话,父母应和牙医或医生沟通,而非这一问题使得其父母去找医生和牙医,A)曲解原文意思,故排除;B)内容原文未提及,故排除;D)内容与原文意思相悖,故排除。
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0
大学英语四级
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