单选题最易与气性坏疽混淆的化脓性炎症是

单选题男，42岁。顽固性溃疡2年，拟行手术治疗，不应选择的手术方式是

单选题检查肛管直肠的最常用体位是

单选题男性，50岁，突发上腹痛8小时，剧烈，伴恶心呕吐。查体：末梢循环差，血压95/60mmHg，巩膜无黄染，全腹腹膜刺激征(+)，以上腹为重，移动性浊音(+)，肠呜音弱，腹穿抽出血性液。为明确诊断，哪项检查最有效A．B超B．CTC．MRID．ERCPE．腹穿液淀粉酶

单选题关于直肠癌淋巴转移的叙述，下列哪项不正确

单选题男性，55岁，因肾病综合征(病理为膜性肾病)入院治疗，在应用利尿剂和糖皮质激素的治疗过程中突然持续性腰痛，尿量减少，下肢浮肿加重，蛋白尿显著增多伴肉眼血尿，血肌酐较前增高，B超示双肾较前增大。最可能的原因是( )(2007年)

单选题下列关于急性呼吸窘迫综合征的叙述，不正确的是

单选题下列哪项是桥本甲状腺肿病的表现特点( )(2000年)

单选题下列哪项不是截瘫病人压疮形成的原因（ ）

单选题导致原发性腹膜炎最多见的病因是

单选题用于血容量判断的最佳血流动力学指标是

单选题掌中间隙感染手术切口一般不超过远侧横掌纹，以免损伤的是

单选题嵌顿的小肠是小肠憩室称为

单选题A．肝穿抽出棕褐色脓汁B．甲胎蛋白(+)C．寒战，高热，肝区疼痛，肝肿大D．Casoni试验(+)E．CEA升高

单选题A．疝囊高位结扎术B．疝修补术C．两者均需D．两者均不需 (2000年)

单选题The question of where insights come from has become a hot topic in neuroscience, despite the fact that they are not easy to induce experimentally in a laboratory. Dr. Bhattacharya and Dr. Sheth have taken a creative approach. They have selected some brain-teasing but practical problems in the hope that these would get closer to mimicking real insight: To qualify, a puzzle had to be simple, not too widely known and without a methodical solution. The researchers then asked 18 young adults to try to solve these problems while their brainwaves were monitored using an electroencephalograph (EEG). A typical brain-teaser went like this. There are three light switches on the ground-floor wall of a three-storey house. Two of the switches do nothing, but one of them controls a bulb on the second floor. When you begin, the bulb is off. You can only make one visit to the second floor. How do you work out which switch is the one that controls the light? This problem, or one equivalent to it, was presented on a computer screen to a volunteer when that volunteer pressed a button. The electrical activity of the volunteer’s brain (his brainwave pattern) was recorded by the EEG from the button’s press. Each volunteer was given 30 seconds to read the puzzle and another 60 to 90 seconds to solve it. Some people worked it out; others did not. The significant point, though, was that the EEG predicted who would fall where. Those volunteers who went on to have an insight (in this case that on their one and only visit to the second floor they could use not just the light hut the heat produced by a bulb as evidence of an active switch) had had different brainwave activity from those who never got it. In the right frontal cortex, a part of the brain associated with shifting mental states, there was an increase in high-frequency gamma waves (those with 47-48 cycles a second). Moreover, the difference was noticeable up to eight seconds before the volunteer realised he had found the solution. Dr. Sheth thinks this may he capturing the “transformational thought” in action, before the brain’s “owner” is consciously aware of it. This finding poses fascinating questions about how the brain really works. Conscious thought, it seems, does not solve problems. Instead, unconscious processing happens in the background and only delivers the answer to consciousness once it has been arrived at. Food for further thought, indeed.

单选题成人心肺复苏时，胸外心脏按压的频率应为( )(2000年)

单选题A．200mmHg B．250～300mmHgC．300～400mmHg D．400～600mmHgE．600～650mmHg止血带的不正确使用，常造成周围神经损伤，针对下列情况，应使用的止血带压力为

单选题原发性肾病综合征患者，首次治疗，每日用泼尼松60mg，三周后尿蛋白仍为(++++)，此时应A．改用地塞米松B．将泼尼松加量到80mg/dC．改为环磷酰胺D．用原量继续观察E．减少泼尼松用量到40mg/d，加用免疫制剂

单选题门静脉高压症大出血导致肝昏迷的原因是