第14题: [单项选择]患者,男性,76岁,慢性肺源性心脏病急性加重入院,查动脉血气分析:PaO245mmHg,PaCO275mmHg。应给予的氧疗是 A. 持续低流量、低浓度给氧 B. 持续高流量、高浓度给氧 C. 间歇低流量、低浓度给氧 D. 间歇高流量、高浓度给氧 E. 间歇高流量、乙醇湿化给氧 参考答案:A 答案解析:由题干可知,该患者出现了Ⅱ型呼吸衰竭,应采用低浓度(<30%~35%)持续给氧。其原因为低浓度给氧既可防止严重缺氧引起的组织损伤,又可防止二氧化碳潴留加重;而问歇吸氧不仅不能防止二氧化碳潴留加重,还会
第18题:[单选题] A share of common stock in a firm represents an ownership interest in that firm and allows stockholders to A. vote. B. receive dividends. C. receive interest payments. D. only A and B of the above. 参考答案:D