问题 单项选择题

慢性肺源性心脏病患者急性加重,严重Ⅱ型呼吸衰竭,应用气管插管及呼吸机辅助呼吸。3小时后,氧分压由50mmHg升至80mmHg,二氧化碳分压由80mmHg下降至 25mmHg,pH 7.59,BE-1。考虑为

A.继发性呼吸性酸中毒,代偿期
B.原发性呼吸性碱中毒,失代偿期
C.原发性呼吸性酸中毒合并原发性代谢性碱中毒
D.继发性呼吸性酸中毒合并原发性代谢性碱中毒
E.原发性呼吸性碱中毒合并继发性代谢性碱中毒

答案

参考答案:E

解析:[考点] 严重Ⅱ型呼吸衰竭患者应用气管插管及呼吸机辅助呼吸的并发症

[分析]: 严重Ⅱ型呼吸衰竭患者应用气管插管及呼吸机辅助呼吸,3小时后血气分析示血二氧化碳分压低于正常,系由于短期内排出过多二氧化碳,造成呼吸性碱中毒。同时患者二氧化碳潴留未纠正时,肾代偿性保留碳酸氢盐,机械通气后呼吸性酸中毒很快得到纠正,但肾还未及时排出多余的碳酸氢根,导致继发性代谢性碱中毒。

单项选择题

In the next century we’ll be able to alter our DNA radically, encoding our visions and vanities while concocting new life-forms. When Dr. Frankenstein made his monster, he wrestled with the moral issue of whether he should allow it to reproduce, "Had I the right, for my own benefit, to inflict the curse upon everlasting generations" Will such questions require us to develop new moral philosophies

Probably not. Instead, we’ll reach again for a time-tested moral concept, one sometimes called the Golden Rule and which Kant, the millennium’s most prudent moralist, conjured up into a categorical imperative: Do unto others as you would have them do unto you; treat each person as an individual rather than as a means to some end.

Under this moral precept we should recoil at human cloning, because it inevitably entails using humans as means to other humans’ ends and valuing them as copies of others we loved or as collections of body parts, not as individuals in their own right. We should also draw a line, however fuzzy, that would permit using genetic engineering to cure diseases and disabilities but not to change the personal attributes that make someone an individual (IQ, physical appearance, gender and sexuality).

The biotech age will also give us more reason to guard our personal privacy. Aldous Huxley in Brave New World, got it wrong: rather than centralizing power in the hands of the state, DNA technology has empowered individuals and families. But the state will have an important role, making sure that no one, including insurance companies, can look at our genetic data without our permission or use it to discriminate against us.

Then we can get ready for the breakthroughs that could come at the end of the next century and the technology is comparable to mapping our genes: plotting the 10 billion or more neurons of our brain. With that information we might someday be able to create artificial intelligences that think and experience consciousness in ways that are indistinguishable from a human brain. Eventually we might be able to replicate our own minds in a "dry-ware" machine, so that we could live on without the "wet-ware" of a biological brain and body. The 20th century’s revolution in infotechnology will thereby merge with the 21st century’s revolution in biotechnology. But this is science fiction. Let’s turn the page now and get back to real science.

From the text, we learn that Aldous Huxley is of the opinion that()

A. the power of biotechnology is to be decentralized

B. no one is entitled to discriminate against others

C. biotechnology is nothing more than gene-mapping

D. artificial intelligence compete with a human brain

单项选择题