ARDS发生的最基本的病理基础是（）
A.低氧血症
B.酸中毒
C.肺泡内及间质水肿
D.呼吸道梗阻
E.通气功能障碍
参考答案：C
解析：ARDS的病理基础是肺泡-毛细血管膜损伤，血管通透性增高，血液成分渗漏，肺间质和肺泡发生水肿。肺表面活性物质的数量减少和活性降低是引起ARDS患者发生顽固性低氧血症和肺顺应性降低的重要原因。因通气/血流比例失调，造成换气功能严重受损的低氧血症。
| 完形填空。 Qian Lei is a student of Class Two, Grade Seven. He is twelve yours old. He often wastes (浪费) 1 at home and at school. The teacher 2 about him and asks his father to talk with him. One evening, 3 supper his father asks him, " How do you like the vegetables and the meat?" "Oh, they are just so-so. They 4 delicious." "They are delicious, I think." Says the father. "When I am at the age of yours, I go to school 5 every day. It is ten kilometers from my home to the school. I have 6 bike, no pencil-box. I can't eat water-ice or ice-cream. There aren't TV sets, fridges, washing machines 7 any other electric things in my home. After school I have to do a lot of housework 8 my parents. When your grandparents are at the age of yours, they can't go to 9 because they are very poor. They have only a little food and they have to do a lot of hard work. There is no light, telephone or radio in their home." "Don't they have a telephone or a radio?" says the boy. "Why don't they 10 some money from the bank (银行) to buy the living things (生活用品)? I don't believe (相信) you. How do they live? " The father doesn't say anything. | ||||
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