《英语流行话题阅读:语境识词3500》Unit 35 关于阿尔茨海默氏病
时间：2018-12-30 作者：英语课 分类：英语语境识词
Unit 35
About Alzheimer's Disease 1
Dementia is a brain disorder 2 that seriously affects a person's ability to carry out daily activities. The most common form of dementia among older people is Alzheimer's disease (AD), which involves the parts of the brain that control thought, memory, and language. Scientists think that as many as 4.5 million Americans suffer from AD. The disease usually begins after age 60, and risk goes up with age.
AD is named after Dr. Alois Alzheimer, a German doctor. In 1906, Dr. Alzheimer noticed changes in the brain tissue 3 of a woman who had died of an unusual mental illness. He found abnormal 4 clumps 5. Scientists also have found other brain changes in people with AD. Nerve 6 cells die in areas of the brain that are vital to memory and other mental abilities.
Scientists do not yet fully 7 understand what causes AD. Age is the most important known risk factor for AD. Family history is another risk factor. Scientists believe that genetics may play a role in many AD cases. Scientists still need to learn more about what causes AD. In addition to genetics, they are studying education, diet, and environment to learn what role they might play in the development of this disease.
AD begins slowly. At first, the only symptom may be mild forgetfulness. In this stage, people may have trouble remembering recent events, activities, or the names of familiar people or things. They may not be able to solve simple math problems. Such difficulties may be a bother, but usually they are not serious enough to cause alarm.
However, as the disease goes on, symptoms are more easily noticed. People in the middle stages of AD may forget how to do simple tasks, like brushing their teeth or combing their hair. They can no longer think clearly. They begin to ae problems speaking, understanding, reading, or writing. Later on, people with AD may become anxious or aggressive, or wander away from home. Eventually, patients need total care.
AD is a slow disease, starting with mild memory problems and ending with severe brain damage. No treatment can stop AD. However, for some people in the early and middle stages of the disease, some dugs may help prevent some symptoms from becoming worse for a limited time. Developing new treatments for AD is an active area of research. Research has shown that vitamin E, estrogen, and ginkgo biloba slow the progress of AD.
- The doctors are trying to stamp out the disease.医生正在尽力消灭这种疾病。
- He fought against the disease for a long time.他同疾病做了长时间的斗争。
- When returning back,he discovered the room to be in disorder.回家后，他发现屋子里乱七八糟。
- It contained a vast number of letters in great disorder.里面七零八落地装着许多信件。
- As we age we lose muscle tissue.肌肉组织会随着我们日趋衰老而萎缩。
- Athletes have hardly any fatty tissue.运动员几乎没有什么脂肪组织。
- This warm weather is abnormal for February.二月里这种温暖的天气不太正常。
- That is simply abnormal.那简直是反常的。
- These plants quickly form dense clumps. 这些植物很快形成了浓密的树丛。 来自《简明英汉词典》
- The bulbs were over. All that remained of them were clumps of brown leaves. 这些鳞茎死了，剩下的只是一丛丛的黃叶子。 来自《简明英汉词典》
- Did he have the nerve to say that?他竟有脸说这话吗？
- He never got up enough nerve to meet me.他从没有足够的胆量来见我。