原发性高血压的最重要的致病原因是
A．摄盐量过多
B．吸烟
C．交感神经兴奋性增强
D．肾上腺嗜铬细胞瘤
E．遗传素质
参考答案：E
解析：[考点] 原发性高血压
[分析] 原发性高血压的最重要的致病原因是遗传素质，约70%以上的病人有遗传背景。在遗传因素的基础上，摄盐量过多、吸烟、交感神经兴奋性增强都在原发性高血压的发生中起作用。而肾上腺嗜铬细胞瘤患者发生的高血压属于继发性高血压。
| Many people would feel 1 about helping others with money if they had 2 money as Daniel and Yao Ming. In May this year, Yao Ming, a basketball 3 , held a TV show in Shanghai and he collected $ 300,000 to help scientists 4 the medical research. "We must do something to help our country at this difficult time," he said. One day, Daniel woke up in the morning and collected his post. There was a letter for him with a pictureof a 5 horse. It is from a charity, 6 him to give money to help save animals. The door bell rang and there was an old woman on Daniel's doorstep. She was asking for money 7 old people. When he returned on the TV, he heard sad 8 and saw a picture of a weak child who was dying of 9 in Africa. He knew those poor children needed 10 . He was always ready to help those in trouble. | ||||
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