未知题型

下列各项，不适用塞因塞用的病证是A.脾虚腹胀 B.血枯经闭 C.气郁胀满

A.脾虚腹胀
B.血枯经闭
C.气郁胀满
D.肾虚癃闭
E.阴虚便秘

【参考答案】

C
塞因塞用是以补开塞，适用于因虚而出现闭阻症状的真虚假实证，而气郁胀满是实证，故不适用。故选C。

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相关考题

未知题型

THE HYDROGEN ECONOMY
It seems-like every day there is a new announcement in the news about automobiles powered by fuel cells. The promises are great, since fuel cells have the potential to very quickly double the efficiency of cars while significantly reducing air pollution.
At the same time, there have been news stories for decades about the problems associated with petroleum. Everything from oil spills to ozone(臭氧) alerts to global warming gets blamed on our dependence on fossil(化石) fuels.
These two forces are leading the world toward what is broadly known as the hydrogen economy. If the predictions are true, over the next several decades we will all begin to see an amazing shift away from the fossil fuel economy we have today toward a much cleaner hydrogen futurE.
Problems with the fossil fuel economy
While fossil fuels have played an important role in getting society to the point it is at today, there are four big problems that fossil fuels create:
Air pollution—When cars burn gasoline, the internal combustion engine also produces:
Carbon monoxide, a poisonous gas
Nitrogen oxides, the main source of urban smog
Unburned hydrocarbons, the main source of urban ozone
Environmental pollution—The process of transporting and storing oil has a big impact on the environment whenever something goes wrong. An oil spill, pipeline explosion or well fire can create a huge mess.
Global warming—The carbon dioxide coming out of every car's tailpipe is a greenhouse gas that is slowly raising the temperature of the planet. The ultimate effects are unknown, but it is a strong possibility that, eventually, there will be dramatic climate changes that affect everyone on the planet.
Dependence—The United States, and most other countries, cannot produce enough oil to meet demand, so they import it from oil-rich countries. That creates an economic dependencE.When Middle East oil producers decide to raise the price of oil, the rest of the world has little choice but to pay the higher pricE.
Advantages of the hydrogen economy
The hydrogen economy promises to eliminate all of the problems that the fossil fuel economy creates. Therefore, the advantages of the hydrogen economy include:
The elimination of pollution caused by fossil fuels—When hydrogen is used in a fuel cell to create power, it is a completely clean technology. The only byproduct is water. There are also no environmental dangers like oil spills to worry about with hydrogen.
The elimination of greenhouse gases—If the hydrogen comes from the electrolysis of water, then hydrogen adds no greenhouse gases to the environment. There is a perfect cycle—electrolysis produces hydrogen from water, and the hydrogen recombines with oxygen to create water and power in a fuel ceil.
The elimination of economic dependence—The elimination of oil means no dependence on the Middle East and its oil reserves.
Distributed production—Hydrogen can be produced anywhere that you have electricity and water. People can even produce it in their homes with relatively simple technology.
The problems with the fossil fuel economy are so great, and the environmental advantages of the hydrogen economy so significant, that the push toward the hydrogen economy is very strong.
Technological Hurdles(障碍)
The big question with the hydrogen economy is, 'Where does the hydrogen come from?' After that comes the question of transporting, distributing and storing hydrogen. Hydrogen tends to be large and tricky in its natural gaseous form.
Once both of these questions are answered in an economical way, the hydrogen economy will be in placE.
Where does the hydrogen come from?
There are two possible sources for the hydrogen:
&n
A.Y
B.N
C.NG

单项选择题

张虹，女，9个月。因支气管肺炎入院，体温39℃，呼吸60次／min，心率170次／min，烦躁，鼻翼煽动，口唇发绀，且进行性加重，心音低钝，肺部细湿啰音增多。诊断为肺炎合并心力衰竭。

A.限制钠、水摄入量
B.清理患儿呼吸道
C.保持安静，避免烦躁、哭闹
D.给予物理降温
E.患儿取右侧卧位

未知题型

阅读以下文字。完成以下问题。
有人认为，摄取充足的维生素和改善机体免疫力以防止辐射对机体的损害是可以达到长寿的目的的。这种看法并没有错，但专业人员认为太过于乐观。
当我们的细胞把氧气和食物转化成化学能量时，我们身体每时每刻都在产生自由基。自由基能损害DNA和细胞膜，这种伤害可导致衰老。当然，很多生物都有天然的抗氧化剂和酶，它们可以阻止自由基的产生。补充抗氧化剂维生素或模拟抗氧化酶的药物可能会延缓衰老。其实，这只是一种理论，而在这种理论的[ ]下，乐开了怀的是一些厂家和商人。君不见眼下消费，者的钞票正在大把大把地流入生产维生素和抗衰老补充剂厂商的腰包。
事情的真相是，无论我们多么努力都绝不可能消除体内所有的自由基。而且，如果能消除所有的自由基，事情又向另外一种不利于人体健康的方向发展。因为，我们的机体需要一定数量的自由基来维持自身的免疫系统。此外，在千百万年的自然进化中我们身体内在的防御自由基的免疫系统也许进化得天衣无缝，所以基本上难以接受改进。例如，催化清除剂EUK—8和 EUK—134可能帮助短命的线虫增强脆弱的免疫力，但是对于人来说却毫无用处；这些催化清除剂对果蝇的免疫系统也不起作用。
也有事实表明，促进免疫系统清除自由基对提高寿命并非是至关重要的。对生物体的免疫起重要促进作用的有两种酶，它们是超氧化物歧化酶和过氧化氢酶。实验证明，经遗传工程改造的果蝇能产生较多的这两种酶，因此它们的寿命比一般果蝇要延长约10%。但是，也不完全是这样，有些遗传工程改造的果蝇尽管能产生较多的这两种酶，但它们的寿命甚至土匕普通果蝇还要短，其中的原理尚不清楚。
不过，如果对人进行同样的基因工程改造，使超氧化物歧化酶产生增多，那么对于人来说并非幸福，而只是一种灾难。这种过多的酶不仅不能促使人长寿，而且会导致一种严重的神经疾病——肌萎缩性侧索硬化症。
所以，改善免疫力和摄取维生素也并非是科学对我们延年益寿的有效承诺。
下面对“自由基”的解说，不正确的一项是( )。