The gray-haired lady can’t wait to leave the building to search for her dad. Unless watched, she will walk in the streets in an

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问题     The gray-haired lady can’t wait to leave the building to search for her dad. Unless watched, she will walk in the streets in an effort to find her father, who died 30 years ago.
    Not all cases of Alzheimer’s disease look like this, but Alzheimer’s is a serious disease that is said to be the fourth or fifth leading cause of death for people over age 75.
    In the early stages, people may exhibit short term memory loss. Some may experience changes in personality, easy to be angry. As the disease progressive, patient might lose the ability to move and may be unable to speak or move at all. This progressive disease generally lasts 8 to 10 years before death occurs.
    While no one is certain about the reasons of these changes in the brain’s nerve fibers, their effect is certain. Alzheimer’s destroys not only the patients, but also spouses, friends and families.
    What should you do if you notice progressive memory loss in yourself or a loved one? Have the person examined by a doctor who is a specialist in the treatment of Alzheimer’s disease. Though many reasons other than Alzheimer’s disease may cause memory loss, its early diagnosis and treatment may delay some of the most serious effects.
    What feeling will you likely experience should a loved one suffer from Alzheimer’s disease? A person will often go through the various stages of sadness, shock, anger, and so on. If the spouse develops the disease, you may experience hurt and disappointment when he or she doesn’t remember you are married.
    Life for the Alzheimer’s patients and their loved ones will never be the same as the disease progresses, bringing a deep sorrow, loss and even anger towards God. No matter what feelings are present, facing them honestly will serve one better than burying them.
What can we know from the passage?

选项 A、Nerve fibers in the brain will cause Alzheimer’s disease.
B、Early treatment may stop Alzheimer’s disease occurring.
C、When one suffers from Alzheimer’s disease, he will be buried.
D、It is still unknown what causes the changes in the brain’s nerve fibers.

答案D

解析 细节理解题。根据文章第四段内容可知,A选项错误,B和C选项文章中并没有提到,根据文章第四段第一句话可知,没有人确定造成大脑中枢神经纤维变化的原因是什么,故选D。
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