问题补充：
共享题干题根据下列材料，回答题 Diabetes (糖尿病) and Eye Damage Over 2 million Canadians have diabetes. It is the leading cause of blindness in North Americans under 65 years of age. Diabetes is a condition where the body either cannot produce enough insulin (胰岛素) or cannot respond properly to insulin. Insulin is important because it moves glucose (葡萄糖), a simple sugar, into the body's cells from the blooD、The food people eat provides the body with glucose, which is used by the cells as a source of energy. If insulin isn't available or doesn't work correctly to move glucose from the blood into the cells, glucose will stay in the blood, leading to high blood sugar levels. High blood sugar levels damage the blood vessels, including the tiny blood vessels in the eye. This leads to an eye disease known as diabetic retinopathy (糖尿病型视网膜病). The retina (视网膜) is an area at the back of the eye that changes light into nerve signals. With diabetic retinopathy, some blood vessels in the retina are lost, and some of the other blood vessels begin to "leak" blooD、This causes the retina to swell and gradually cuts off its supply of oxygen and nutrients (滋养物). Eventually, the retina starts to grow new blood vessels to replace the damaged ones. Unfortunately, these new vessels are not as strong as the old ones. They are more likely to break, causing bleeding in the eye. At first, people with diabetic retinopathy will not notice any symptoms. As the disease gets worse, they may notice blurred (模糊的) vision, black spots or flashing lights. As time goes on, it can progress to blindness. Everyone with diabetes is at risk for diabetic retinopathy, and the risk increases the longer you've had diabetes.Fortunately, you can reduce your risk if you do not have diabetes, but think you may be at risk for this condition. Visit your doctor to be screened for diabetes. If you do have diabetes: have frequent eye check-ups. Make sure that you monitor your blood sugar frequently and use your medications as recommended by your doctor. There is evidence to show that keeping your blood sugar under tight control can slow down eye damage. If you have high blood pressure, follow your recommended diet and medications to keep it under control. If you are not sure whether you have high blood pressure, or whether your blood pressure is under control, discuss this with your doctor.1.[不定向选择题]The worst eye damage induced by diabetes iA.blurred vision B.black spots? C.blindness? D.flashing light 2.[不定向选择题]To slow down eye damage, people with diabetes should try toA.use as many medications as they can B.eat as little as possible C.wear glasses as often as possible D.keep their blood sugar under tight control
答案：
1.参考答案：C
参考解析：糖尿病引起的最糟糕的眼病为________。?A、视力模糊?B、黑斑?C、失明?D、闪光?利用题干关键词定位到文章第三段，可知糖尿病所能造成的最坏的眼损伤是失明。?
2.参考答案：D
参考解析：为了延缓眼睛损伤，有糖尿病的人应该尽力________。?A、使用尽可能多的药物?B、少吃东西?C、多戴眼镜?D、严格控制血糖?利用题于关键词定位到文章的最后一段，可以得知，患有糖尿病的病人如果能严格控制自己的血糖，将有助于延缓眼损伤。3.[不定向选择题]Glucose cannot be turned into energy in the bodyA.without diabetes? B.without sugar C.without insulin? D.without food
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