单选题生殖细胞向胚外组织分化而形成的肿瘤是

单选题手部开放性损伤后，早期清创缝合不应超过的时间是A．4小时B．8小时C．12小时D．16小时

单选题关于细胞性新月体性狼疮性肾炎首先采用的治疗是

单选题胸部损伤后的主要症状是（ ）

单选题骨折急救处理中，哪项错误( )(1995年)

单选题男，70岁。发现大量蛋白尿2周入院。入院后查本周蛋白尿阳性。为明确诊断，检查意义最大的是

单选题A．柏油样黑便B．呕大量鲜红血可伴休克C．便血与呕血D．以便血为主，不呕血E．腹腔内大出血

单选题A．手术治疗B．化学治疗C．放射治疗+手术治疗D．化学治疗+手术治疗

单选题狭窄性腱鞘炎的病理改变为

单选题下列输血适应证中哪一项是错误的

单选题对蛛网膜下腔麻醉(腰麻)术后并发低压头痛的处理，下列哪项是错误的( )(2004年)

单选题泌尿系梗阻最危险的是

单选题膜性肾小球肾炎电镜下的特征性病变是A．系膜区低密度电子致密物沉积B．基底膜外侧驼峰样电子致密物沉积C．上皮下电子致密物与基底膜样物质形成钉突结构D．基底膜内皮侧、致密层和系膜区电子致密物沉积

单选题不符合轻微病变性肾小球肾炎的是

单选题月经周期中诱发排卵最重要的激素是

单选题女，59岁。右下腹隐痛，伴腹胀、腹泻3个月余，诊断为右侧结肠癌。手术探查发现：距回盲瓣5cm处升结肠腔内一3cm×4cm质硬肿块，呈结节状，累及浆膜层，未见壁腹膜受累和腹腔内淋巴结转移灶，行右侧结肠根治术，术后病理证实为腺癌，癌肿穿透肠壁，切除相应系膜内淋巴结转移0／19。按照我国补充的Dukes分期标准，初步判定为

单选题无痛性肉眼血尿最多见的原因是

单选题A．胃大部切除术后倾倒综合征B．胃大部切除术后低血糖综合征C．两者都是D．两者都不是

单选题下列属于择期手术的是

单选题"We're using the wrong word," says Sean Drysdale, a desperate doctor from a rural hospital at Hlabisa in northern KwaZulu-Natal. "This isn't an epidemic, it's a disaster. " A recent UNIEF report, which states that almost one-third of Swaziland's 900,000 people are infected with HIV, the virus that causes AIDS, supports this diagnosis. HIV is spreading faster in southern Africa than anywhere else in the world. But is anyone paying attention? Despite the fact that most of the world's 33.5 million HIV/AIDS cases are in sub-Saharan Africa—with an additional 4 million infected each year—the priorities at last week's Organization of African Unity summit were conflict resolution and economies development. Yet the epidemic could have a greater effect on economic development—or, rather, the lack of it—than many politicians suspect. While business leaders are more concerned about the 2K millennium bug than the long-term effect of AIDS, statistics show that the workfare in South Africa, for instance, is likely to be 20% HIV positive by next year. Medical officials and researchers warn that not a single country in the region has a cohesive government strategy to tackle the crisis. The way managers address AIDS in the workplace will determine whether their companies survive the first decade of the 21st century, says Deane Moore, an actuary for South Africa's Metropolitan Life Insurance Company. Moore estimates that in South Africa there will be 580,000 new AIDS cases a year and a life expectancy of just 38 by 2010. "We'll be back to the Middle Ages," says Drysdale, whose hospital is in one of the areas in South Africa with the highest rates of HIV infection. "The graph is heading toward the vertical. And yet people are still not taking it seriously. " Most southern African countries are simply too poor to supply more than basic health services, let alone medicines, to confront the crisis. Patients in some government hospitals in Harare have to supply their own bedding, food, drugs and, in some cases, even their own nurses. Zimbabwe's frail domestic economy depends to a large extent on informal enterprises and small businesses, many of which are going bankrupt as AIDS takes its toll on owners and employees. "The ripple effect is devastating," says Harare AIDS researcher Rene Loewenson. More ominous are the implications for South Africa with a sophisticated industrial infrastructure as well as a widespread informal sector. While the South African government is active in promoting AIDS education, it hasn't the money, manpower or material to cope with the attack of AIDS.