单选题男性，19岁，反复左踝关节肿痛1年，偶有晨起背部不适，化验HLAL－B27(＋)，最可能的诊断是

单选题女性，34岁。乏力、面色苍白、尿色黄1年。贫血貌，巩膜黄染。脾肋下2指。血清总胆红素37μmol／L，间接胆红素27μmol／L，肝功能正常。Hb 65g／L，白细胞7．5×10 9 ／L，血小板170×10 9 ／L。网织红细胞10％。该患者

单选题分泌内因子的细胞是

单选题肺结核并发肺不张最常见原因

单选题哪些指标与甲状腺功能亢进症的病情呈平行关系

单选题Increasingly, historians are blaming diseases imported from the Old World for the great disparity between the native population of America in 1492--new estimates of which jump as high as 100 million, or approximately one-sixth of the human race at that time--and the few million full-blooded Native Americans alive at the end of the nineteenth century. There is no doubt that chronic disease was an important factor in the sharp decline, and it is highly probable that the greatest killer was epidemic disease, especially as manifested in virgin-soil epidemics. Virgin-soil epidemics are those in which the populations at risk have had no previous contact with the diseases that strike them and are therefore immunologically almost defenseless. That virgin-soil epidemics were important in American history is strongly indicated by evidence that a number of dangerous maladies--smallpox, measles, malaria, yellow fever, and undoubtedly several more--were unknown in the pre-Columbian New World. The effects of their sudden introduction are demonstrated in the early chronicles of America, which contain reports of horrible epidemics and steep population declines, confirmed in many cases by quantitative analyzes of Spanish tribute records and other sources. The evidence provided by the documents of British and French colonies is not as definitive because the conquerors of those areas did not establish permanent settlements and began to keep continuous records until the seventeenth century, by which time the worst epidemics had probably already taken place. Furthermore, the British tended to drive the native populations away, rather than to enslave them as the Spaniards did; so that the epidemics of British America occurred beyond the range of colonists' direct observation. Even so, the surviving records of North America do contain references to deadly epidemics among the native population. In 1616--1619 an epidemic, possibly of pneumonic plague, swept coastal New England, killing as many as nine out of ten. During the 1630's smallpox, the disease most fatal to the Native American people, eliminated half the population of the Huron and Iroquois confederations. In the 1820's fever ruined the people of the Columbia River area, killing eight out of ten of them. Unfortunately, the documentation of these and other epidemics is slight and frequently unreliable, and it is necessary to supplement what little we de know with evidence from recent epidemics among Native Americans. For example, in 1952 an outbreak of measles among the Native American inhabitants of Ungava Bay, Quebec, affected 99 percent of the population and killed 7 percent, even though some had the benefit of modern medicine. Cases such as this demonstrate that even diseases that are not normally fatal can have destroying consequences when they strike an immunologically defenseless community.Notes: disparity 差距。 virgin-soil处女地。 malady 疾病 chronicle 编年史。 tribute 贡品。 pneumonic plague肺鼠疫。confederation 同盟。 smallpox 天花。measles 麻疹。

单选题在治疗休克过程中，监护输液量及输液速度的最好的指标是

单选题导致急性左心功能不全的原因是

单选题原发性肺结核病的病变特点是( )(1993年)

单选题下列哪项不符合呼吸性酸中毒合并代谢性酸中毒的血气检查结果A．PaCO2升高B．减少C．AB=SB≤正常值D．BE负值减小E．pH明湿降低

单选题哪项是慢性肺源性心脏病所不具备的( )(1992年)

单选题男性，41岁，因咳嗽、咳脓痰反复发作，间断咯血20余年，加重3天就诊。该患者有10年吸烟史，平均10支／天，已戒烟2年。查体左下肺可闻固定性湿啰音。胸片示双下肺纹理紊乱，以左下为著。最可能的诊断为

单选题在SLE应用激素冲击疗法中，下列哪项一般不是适应证A．急性肾衰竭B．NP狼疮的癫痫发作C．NP狼疮的明显精神症状D．严重溶血性贫血E．严重血小板减少性紫癜

单选题日本血吸虫成虫可导致

单选题二尖瓣和主动脉瓣联合瓣膜病可引起

单选题男性，35岁，患肠易激综合征5年，近1个月来排便困难，粪便干结，伴失眠、焦虑。下列不宜选用的治疗药物是( )(2007年)

单选题关于氯霉素引起再生障碍性贫血的说法，下列哪项不正确A．用氯霉素引起的再生障碍性贫血发生率较对照组高6～20倍B．与用药剂量和疗程无关C．多数是不可逆的，即使停止用药，再生障碍性贫血仍继续发展D．可影响骨髓细胞成熟和抑制幼稚细胞增殖E．可能阻滞mRNA的功能

单选题A．尿糖(++++)，酮体阴性B．尿糖(++++)，酮体强阳性C．尿糖阴性，酮体阳性D．尿糖(+)，酮体阳性

单选题过敏性紫癜肾炎属于哪型变态反应

单选题男性患者，30岁，近5月来常发上呼吸道感染，乏力、脸色苍白，2周来感病情加重。查体：双下肢散在出血点，巩膜无黄染，肝脾未触及。化验血Hb70g/L，RBC3．0×10 12 /L，WBC3．1×10 9 /L，Plt70×10 9 /L。