单选题A．圆韧带内的小凹动脉B．股骨干滋养动脉升支C．旋股内、外侧动脉的分支D．骺外侧动脉

单选题导致上消化道大出血最常见的原因是

单选题麻醉中发现CO2蓄积，如排出速度过快，最可能出现的临床表现是A．血压下降，呼吸暂停B．血压下降，呼吸变快C．血压上升，呼吸变快D．血压上升，呼吸变慢

单选题治疗尿路感染，为了加强和巩固疗效，下面哪项是恰当的

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－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

单选题男，31岁。5日前因阑尾炎穿孔腹膜炎做过手术。3日前出现腹痛、腹胀，伴呕吐、肛门停止排气排便，经检查诊断为肠梗阻，最重要的是判断梗阻

单选题大面积烧伤24小时内的病人，首选的主要治疗措施是A．处理创而B．镇静止痛C．液体复苏D．控制感染E．补充营养，增强免疫

单选题A．乳腺囊性增生病B．乳房纤维腺瘤C．乳管内乳头状瘤D．乳癌E．乳房肉瘤

单选题Smith骨折远端的移位畸形是

单选题急性肾盂肾炎的合并证不包括

单选题关于急性血源性骨髓炎的治疗，下列哪项是错误的A．立即开始联合应用足量广谱抗生素B．抗生素治疗48～72小时后，局部症状仍不能控制，应手术治疗C．手术行软组织切开引流术D．少量多次输血，增加病人的抵抗力E．患肢可用皮牵引或石膏托固定

单选题患儿10岁，胫骨中上段慢性骨髓炎，一般情况好，体温不高，局部有流脓窦道，X线片有4cm长整段死骨，周围有不连续包壳。当前的主要治疗是A．手术摘除死骨，肌瓣填塞消灭死腔B．手术摘除死，填入庆大霉素链，三周后取出，松质骨植入C．手术摘除死骨，植入细塑料管，每口经管滴入抗生素D．患肢长腿石膏管型固定，开窗换药E．局部换药，保持引流通畅

单选题The Lakers' forward Kobe Bryant has scored 50 or more points in four straight games, second in the NBA only to Wilt Chamberlain's seven. He also now is tied with Michael Jordan for second with four behind Chamberlain's 32 in most 60-point games. "He's doing something I've never seen," Lakers coach Phil Jackson said in an e-mail Saturday. "This has been historic." He should know because he coached Jordan and played against Chamberlain. Bryant is not going to win the MVP award, which likely will go to Dirk Nowitzki or Steve Nash. But his scoring brilliance again seems to answer the question of who's the best player in the league and it also provides more evidence in the similarity of Bryant and Jordan in their talent and approach to the game. In any ease, Bryant is the player now firmly holding that mythical torch of greatness, sporting celebrity and creativity that Jordan once took from Julius "Dr. J" Erring. "Kobe has the verdant green light to hoist it up until he cools down," Jackson said. "Wonders never cease in this game." Certainly, Bryant has been wonderful in the four games, averaging 56.3 points with two games of at least 60. Moreover, he hardly has been selfish or working outside the offense because most of his field goals have come on long jumpers, including 17 of 33 on three-pointers. Bryant is shooting 54 percent. "It's phenomenal. It's incredible," Jackson told Los Angeles reporters. "He's shooting [outside] more than Michael was. Michael was probably doing more post-up, more penetration, more at-the-basket kind of stuff. But Kobe's doing a whole range of things. I think his shooting has just been remarkable, the way he is raising up over people and knocking the ball down." It's still a long way off, but because he started in the NBA when he was 18, Bryant, 28, can pass Kareem Abdul-Jabbar as the league's all-time scorer if he can stay healthy and average 25 points until he is 38. "The best part of it all is that we're winning," Bryant said. "The second is that this generation of players who might not have ever heard of the Elgin [Baylors] or Wilts [and their] greatness will now take notice so the legacy of their brilliance will live on. "As far as myself, I can't explain it. All is in slow motion all the time. I don't know why or how, but it's trippy." That's probably what Chamberlain said during his record run.

单选题It is a wise father that knows his own child, but today a man can boost his paternal (fatherly) wisdom— or at least confirm that he's the kid's dad. All he needs to do is shell out $30 for paternity testing kit (PTK) at his local drugstore—and another $120 to get the results. More than 60,000 people have purchased the PTKs since they first became available without prescriptions last year, according to Doug Fogg, chief operating officer of Identigene, which makes the over-the-counter kits. More than two dozen companies sell DNA tests directly to the public, ranging in price from a few hundred dollars to more than $ 2,500. Among the most popular: paternity and kinship testing, which adopted children can use to find their biological relatives and families can use to track down kids put up for adoption. DNA testing is also the latest rage among passionate genealogists—and supports businesses that offer to search for a family's geographic roots. Most tests require collecting cells by swabbing saliva in the mouth and sending it to the company for testing. All tests require a potential candidate with whom to compare DNA. But some observers are skeptical. "There is a kind of false precision being hawked by people claiming they are doing ancestry testing," says Troy Duster, a New York University sociologist. He notes that each individual has many ancestors—numbering in the hundreds just a few centuries back. Yet most ancestry testing only considers a single lineage, either the Y chromosome inherited through men in a father's line or mitochondrial DNA, which is passed down only from mothers. This DNA can reveal genetic information about only one or two ancestors, even though, for example, just three generations back people also have six other great-grandparents or, four generations back, 14 other great-great-grandparents. Critics also argue that commercial genetic testing is only as good as the reference collections to which a sample is compared. Databases used by some companies don't rely on data collected systematically but rather lump together information from different research projects. This means that a DNA database may have a lot of data from some regions and not others, so a person's test results may differ depending on the company that processes the results. In addition, the computer programs a company uses to estimate relationships may be patented and not subject to peer review or outside evaluation.

单选题男性，45岁，慢性肾炎慢性肾功能不全3年，7天来尿量明显减少，强心利尿效果不佳，血压190／120mmHg，血肌酐987μmol／L，尿素氮25mmol／L，二氧化碳结合力13mmol／L，给予5％碳酸氢钠100ml静滴后。出现呼吸困难。心率达140次／分，双肺底部有少许中细湿啰音，此时治疗最好选择

单选题骨与关节结核发病率最高的部位

单选题人体各种姿势中，对腰椎间盘产生压力最大的是

单选题男，44岁，上腹部被汽车撞伤3小时，面色苍白，四肢厥冷，脉率130次／分，血压70／50mmHg，全腹轻度压痛、反跳痛及肌紧张，应首先考虑是

单选题男，32岁，便秘2年，3日前排便用力后肛门剧痛，近2日大便时和排便后肛门疼痛加重，粪便于结，且其表面及便纸上附有鲜血，其诊断可能为

单选题肌酐清除率与下列哪项无关( )(1994年)