单选题 17岁男性中学生，十二指肠溃疡空腹穿孔，弥漫性腹膜炎2小时，行保守治疗，按一般病理变化规律，腹膜炎形成后，可产生以下不同后果，除了: A、渗出物逐渐被完全吸收，炎症消散而痊愈 B、病变局限，形成局限性腹膜炎 C、炎性渗出液积聚在肠间，形成肠间脓肿 D、炎性渗出液积聚在膈下，形成膈下脓肿 E、炎症，感染严重，穿破后腹膜，形成腹膜后脓肿

单选题男，68岁，排尿困难伴尿急、尿痛4年。查体：直肠指检前列腺增大，质软，中央沟消失。尿常规示白细胞(＋)、红细胞(－)。膀胱区平片未见异常。首先考虑的诊断是

单选题关节活动障碍的原因中，下列哪项是不恰当的

单选题一幽门梗阻病人，血氯83毫克当量／升，血钾3．2毫克当量／升，应补给何种液体( )(1991年)

单选题 关于胰尾正确的（　　） A、属腹膜外位 B、属腹膜间位 C、行于胃脾韧带内 D、行于脾肾韧带内 E、位置固定，无活动性

单选题多发的T1期膀胱癌，治疗后多次复发并且恶性程度增高，应选择

单选题前列腺增生症的重要症状是：

单选题 下述几种类型的黄色瘤最常见的是(附图) ( ) A、扁平黄色瘤 B、眼睑黄色瘤 C、腱黄色瘤 D、结节样黄色瘤 E、疹样黄色瘤

单选题男性，18岁。近一年反复腰部疼痛，活动受限。近两月来，又出现双髋疼痛，轻度屈曲畸形，需拄拐行走。X线检查显示：双侧骶髂关节面模糊，双侧股骨头表面毛糙，髋关节间隙变窄。(2012年)

单选题Thomas征是检查下列哪种畸形的恰当方法

单选题A．酒窝征 B．橘皮征 C．卫星结节 D．乳头凹陷

单选题男性，20岁，工人，用力打苍蝇时致右肱骨上端骨折，此时应首先考虑是A．肱骨大结节撕脱骨折B．肱骨外科颈骨折C．肱骨解剖颈骨折D．病理骨折E．疲劳骨折

单选题区别血尿和血红蛋白尿的主要方法是

单选题"My own feelings went from disbelief to excitement to downright fear," says Carl Hergenrother, 23, an Arizona undergraduate who verified a large asteroid barreling toward Earth with a 230em telescope atop nearby Kitt Peak. "It was scary, because there was the possibility that we were confirming the demise of some city somewhere, or some state or small country." Well, not quite. Early last week, his celestial interloper whizzed by Earth, missing the planet by 450620 km--a hairbreadth in astronomical terms. Perhaps half a kilometer across, it was the largest object ever observed to pass that close to Earth. Duncan Steel, an Australian astronomer, has calculated that if the asteroid had struck Earth, it would have hit at some 93450 km/h. The resulting explosion, scientists estimate, would have been in the 3000-to-12000-megaton range. That, says astronomer Eugene Shoemaker, a pioneer asteroid and comet hunter, "is like taking all of the U.S. and Soviet nuclear weapons, putting them in one pile and blowing them all up." And what if one them is found to be on a collision course with Earth? Scientists at the national laboratories at Livermore, California, and Los Alamos, New Mexico, have devised a number of ingenious plans that, given enough warning time, could protect Earth from a threatening NEO. Their defensive weapons of choice include long-distance missiles with conventional or, more likely, nuclear warheads that could be used either to nudge an asteroid into a safe orbit or blast it to smithereens. Many people-including some astronomers--are understandably nervous about putting a standby squadron of nuclear tipped missiles in place. Hence the latest strategy, which in some cases would obviate the need for a nuclear defense: propelling a fusillade of cannonball-size steel spheres at an approaching asteroid. In a high-velocity encounter with a speeding NEO, explains Gregory Canavan, a senior scientist at Los Alamos, "the kinetic energy of the balls would change into heat energy and blow the thing apart." Some astronomers oppose any immediate defensive preparations, citing the high costs and low odds of a large object's striking Earth in the coming decades. But at the very least, Shoemaker contends, NEO detection should be accelerated. "There's this thing cal4ed the 'giggle factor' in Congress," he says, "people in Congress and also at the top level in NASA still don't take it seriously. But we should move ahead. It's a matter of prudence." The world, however, still seems largely unconcerned with the danger posed by large bodies hurtling in from space, despite the spectacle two years ago of Comet Shoemaker-Levy 9 riddling the planet Jupiter with mammoth explosions. It remains to be seen whether last week's record near-miss has changed any minds.

单选题 以下对侧柱的描述正确的是（ ） A、位于腰1至腰5脊髓侧角 B、是交感神经节前神经元胞体所在的部位 C、是副交感神经节后神经元胞体所在的部位 D、仅见于胸脊髓节段 E、传导内脏感觉

单选题关于破伤风的叙述，下列哪项是错误的?

单选题 42岁女性，时有右上腹疼痛及镜下血尿，体检时发现腹部正位X线片有一0.5×0.3cm密度增高影，侧位片见该阴影位于第三腰椎前缘之后，首先考虑为 A、胆囊结石 B、胆管结石 C、静脉石 D、上尿路结石 E、肠系膜淋巴结钙化

单选题直肠肛管周围脓肿最常见的病因是

单选题治疗早期胃癌的有效方法是

单选题下列符合休克代偿期血压变化的是