Glaucoma（青光眼）is a major cause of blindness around the world, especially in developing countries. The World Health Organization says glaucoma is a greater public health challenge than cataracts（白內(nèi)障）, because the blindness caused by the latter can be cured after operations.
Glaucoma is a disease that makes people around the world lose their sight, and they usually don’t even know they have the disease until it has permanently destroyed at least 40 percent of their sight. The process is usually so painless and subtle（不明顯的）, so people don't notice it. Actually, the simplest medical test can discover it.
“It is the leading cause of blindness in the United States. In Hispanics and in African-Americans, it’s the second leading cause of blindness and so is the case in the Chinese and Indians.” said Dr. Alan Robin, a specialist in treating glaucoma. “The glaucoma we see in sub-Saharan Africa is a much more aggressive blinding disease than the glaucoma we see in Americans or even African- Americans in-the United States.” he said．     ．
Dr. Eric Fleischer also sees these differences at Medstar Washington Hospital Center. “Pretty much anybody who has ancestors in Africa has an increased chance of developing glaucoma.” Age is another thing that may lead to glaucoma, although people of all ages can get it.
Glaucoma is a group of diseases that commonly produce pressure in the eye. An eye is sort of like a watch. And behind the face of the watch, liquid is made. It goes through your pupil（瞳孔）and into the front of the watch between the face and the crystal．There's an area around the edge of the watch that drains（使排出）the liquid. When that drain is blocked, the liquid can't leave the eye as fast as it is produced. The rising pressure within the eye damages and eventually kills the optic（視覺的） nerve. The result is blindness.
Fortunately, if caught early, glaucoma can be controlled. Glaucoma is not curable. But as  researchers worldwide lean more about it, they grow more hopeful that glaucoma can one day be cured or even prevented.
小題1:In which country is glaucoma the biggest danger to people’s sight?
A．In ChinaB．In IndiaC．In the USAD．In Japan
小題2:What do the underlined words “these differences”（in Para 4 ）refer to?
A．The differences in regions（地區(qū)）B．The cultural differences
C．The differences in ageD．The physical differences
小題3:From the passage, we can learn that,            .
A．It is hard for medical tests to discover glaucoma
B．People in developed countries hardly develop glaucoma
C．Glaucoma only causes blindness among old people
D．The research on glaucoma is still going on worldwide

小題1:C
小題2:A
小題3:D 

試題分析：文章介紹了青光眼的形成和危害，以及不同地區(qū)青光眼的危害的差異。
小題1:細節(jié)題：從第三段的句子：“It is the leading cause of blindness in the United States. 可知在美國青光眼對人們的視力是最大的威脅。選C
小題2:推理題：文章第三段主要講了青光眼地區(qū)分布的差異。第四段里面的differences就是“地區(qū)差異”。選A
小題3:細節(jié)題：從最后一段的句子：But as  researchers worldwide lean more about it, they grow more hopeful that glaucoma can one day be cured or even prevented.可知對青光眼的研究還在全世界進行。選D
點評：：文章介紹了青光眼的形成和危害，以及不同地區(qū)青光眼的危害的差異。本文細節(jié)題居多，答題時在文章找到對應(yīng)的地方，用筆進行標記，這有利于后期有時間檢查時可以立刻找到答案的位置。仔細理解作者所講的意思，再結(jié)合選項，通過排除法和自己對全文的把握，選出正確答案。
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D．Fat people who like exercising are also likely to live longer.
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Two American scientists told the people in industrial nations that they would be much healthier if they ate more of the same kind of foods eaten by humans living more than 10,000 years ago. 
The scientists say that the human body has changed very little since human first appeared on earth, but the way we live has changed greatly. Our body has not been able to deal with these changes in life style and this has led to new kinds of sicknesses. These new sicknesses were not known in ancient times. So they are called “diseases of civilization”. Many cancers and diseases of the blood system, including heart attacks and strokes（中風(fēng)） are examples of such diseases. 
Scientists noted that early stone-age people used very little alcohol or tobacco, probably none. Ancient people also got a great deal of physical exercise, but a change in food is one of the main differences between life in ancient times and life today. 
Stone-age people hunted wild animals for their meat, which had much less fat than farm animals. They also ate a lot of fresh wild vegetables, and fruits. They did not use milk and other dairy products, and they made very little use of grains. But today, we eat a large amount of dairy products and grain foods. We eat six times more salt than stone-age people. We eat more sugar. We eat twice as much fat but only one third as much protein and much less vitamin C. 
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A．more foods as humans living 10,000 years ago did
B．a(chǎn)s humans living 10,000 years ago ate
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D．more of the same kinds of foods eaten by people over 10,000 years ago
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D．the way we live today are improper for the human body
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A．Ancient people did a great deal of physical exercise.
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C．People today have more tobacco.
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