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问题 单项选择题 A3/A4型题

患者，女，69岁，双膝关节疼痛伴活动受限2年。步态不稳，膝内翻畸形，膝关节肿胀，左右侧副韧带、外侧关节缝、膝脂肪垫、股四头肌止点、半腱肌半膜肌止点、腓肠肌起点压痛（++）。左膝关节属伸受限。

下列治疗中，最迅速有效的是（）。

A.手术治疗

B.理疗

C.膝关节注射

D.口服药物

E.膝关节局部休息

答案

参考答案：C

解析：对于膝关节骨性关节炎的治疗，理疗、口服药物等方法，时间长，疗效差，故选择C是最迅速有效的治疗。

填空题

Some consumer researchers distinguish_____(1) "rational" motives and "emotional" (or "non-rational") motives. They use the term "rationality"_____(2) the traditional economic sense that assumes_____(3) consumers behave rationally when they carefully consider all alternatives_____(4) choose those that give them the greatest utility (i.e., satisfaction). _____(5) a marketing context, the term "rationality" implies that the consumer selects goods based_____(6) totally objective criteria, such_____(7) size, weight, price, and so on. "Emotional" motives imply the selection of goods____(8) to personal or subjective criteria — the desire_____(9) individuality, pride, fear, affection or status.The assumption underlying this distinction is____(10) subjective or emotional criteria do not maximize utility or satisfaction. _____ (11), it is reasonable to assume that consumers always attempt to select alternatives that, ____(12) their view, serve to maximize satisfaction. Obviously, the assessment of satisfaction is a very personal process, based_____(13) the individual’’s own needs as_____(14) as on past behavioral, social, and learning experiences. What may appear_____(15) irrational to an outside observer may be perfectly rational ______(16) the context of the consumer’’s own psychological field. For example, a product purchased to enhance one’’s self-image (such as a fragrance) is a perfectly rational form of consumer behavior. ____(17) behavior did not appear rational to the person who undertakes it_____ (18) the time that it is undertaken, obviously he or she would not do it._____(19) the distinction between rational and emotional motives does not appear to be warranted.Some researchers go so far_____(20) to suggest that emphasis_____ (21) "needs" obscures the rational, or conscious, nature of most consumer motivation. They claim that con sumers act consciously____(22) maximize their gains and minimize their losses; that they act not____(23) subconscious drives but from rational preferences,____(24) what they perceive to be_____(25) their own best interests.
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如图，△ABC中，AB=8，DE垂直平分BC，若△AEC的周长为13，则AC=______．
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