试题与答案

男性,45岁,被诊为特发性肺纤维化,应用糖皮质激素治疗已2个月,近半月出现气短进行性

题型:单项选择题

题目:

男性,45岁,被诊为特发性肺纤维化,应用糖皮质激素治疗已2个月,近半月出现气短进行性加重,伴稀便,每日2~3次,食欲不振,今日到门诊查动脉血气示:pH 7.61,PaCO2 3.3kPa(25mmHg),PaO2 6.7kPa(5mmHg),HCO3ˉ30mmol/L,K+2.6mmol/L,Na+131mmol/L,Clˉ89mmol/L,导致患者发生酸碱失衡的原因为

A.低氧血症,无氧代谢增强,乳酸增多

B.厌食、营养不良、造成饥饿性酮症

C.肺原发病变致肺泡通气量不足

D.久用糖皮质激素伴进食少致钾摄入不足,排出增多

E.腹泻使HCO3ˉ随着肠液的丢失而丢失增加

答案:

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In recent years many countries of the world have been faced with the problem of how to make their workers more productive . Some experts say the 21 is to make jobs more varied . But do more varied jobs 22 greater productivity ?There is evidence to suggest that 23 variety certainly makes the worker’s life more enjoyable , it doesn’t   24 make him work harder . As far as increasing productivity is concerned , then , 25 is not an improtant factor .
Other experts feel that giving the worker 26 to do his job in his own way is important , and there is no doubt that this is ture . The 27  is that this kind of freedom can’t easily be given in the modern factory with its complicated machinery which must be used in a 28 way . Thus while freedom of choice may be important , there is usually very little that can be done to 44 it .
Another important 30 is how much each worker 31 to the product he is making . In most factories the worker 32 only one small part of the product . Some car factories are now 33 with having many small production lines rather than one large one , so that each worker contributes more to the production of the cars on his 34 . It would seem that not only is degree of worker contribution an important factor 35 it is one we can do something about .
To what 36 does more money lead to greater productivity ? The workers themselves certainly think this is 37 . But perhaps they want more money only because the work they do is so boring , 38 just lets them enjoy their spare time more . A 39 argument may explain demands for shorter working hours . Perhaps if we 40 making their jobs more interesting , they will neither want more money , nor will shorter working hours be so important to the .
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B.course
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hristmas
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