单选题 下列哪项不是造血系统恶性克隆性疾病? A、多发性骨髓瘤 B、骨髓增生异常综合征 C、急性白血病 D、缺铁性贫血 E、淋巴瘤

单选题对预防过敏性哮喘效果较好的药是

单选题过多过快抽出胸腔积液的最大危害是

单选题女性，35岁，发现血压高3年，血压平时在150～170／80～00mmHg范围波动，数次阵发升高达210／130mmHg，伴头痛、心悸、恶心呕吐，常规降压效果不佳，平素出汗较多，低热，化验血糖空腹6．9mmol／L，餐后2小时10．5mmol／L。此患者最可能的诊断是

单选题关于缺铁性贫血患者的表现，下列哪项不正确A．感染发生率减低B．口角炎、舌炎、舌乳头萎缩较常见C．胃酸缺乏及胃肠功能障碍D．毛发无泽、易断、易脱E．指甲扁平，甚至“反甲”

单选题下列哪项不符合系膜毛细血管性肾小球肾炎

单选题COPD的发病因素中哪一项最重要

单选题A．支气管腺体肥大、增生；黏膜上皮杯状细胞增多B．肺泡扩张，肺泡壁菲薄或断裂C．肺泡上皮增生，细胞内包涵体形成D．细支气管及周围肺泡化脓性炎E．肺组织高度纤维化

单选题A．下叶后基底段 B．上叶后段或下叶背段C．上叶尖后段和下叶背段 D．上叶下部或下叶上部近胸膜处

单选题关于慢性肉芽肿性炎的描述，错误的是

单选题肺心病急性呼吸衰竭患者血分析结果：pH7．18，PaCO 2 6mmHg，HCO 3 - 6mmol／L，碱剩余一6mmol／L，考虑下列哪一项论断正确

单选题心力衰竭患者伴有高度房室传导阻滞时，应在选择下列哪种治疗的同时使用洋地黄

单选题男性，60岁。因疲劳后突发心悸、呼吸困难、咳嗽、咳泡沫血痰而来院急诊。既往有高血压病、心肌梗死史。查体：血压90／60 mmHg，端坐位，喘息状，口唇发绀，双肺满布中小水泡音，心率140次／分，心音听不清。下列急诊处理中，不正确的是

单选题女性，45岁，既往有Graves病8年，长期口服抗甲状腺素药物治疗，未规律服药，病情时有反复。近2月来感胸闷、心悸。入院后诊断：心房颤动。目前该患者的首选治疗是

单选题下列有关风湿病的描述，哪项是错误的( )(1998年)

单选题A．主动脉夹层B．急性心肌梗死C．肺动脉栓塞D．输尿管结石E．肠系膜动脉栓塞

单选题关于消化性溃疡的癌变，下列哪项是正确的A．各种消化性溃疡均有癌变可能B．癌变发生于溃疡边缘C．癌变率可达1%以上D．症状经严格的内科治疗无改善E．癌变率与年龄无关

单选题世界范围内引起婴幼儿下呼吸道疾病中最常见的病毒是

单选题Large, multinational corporations may be the companies whose ups and downs seize headlines. But to a far greater extent than most Americans realize, the economy's vitality depends on the fortunes of tiny shops and restaurants, neighborhood services and factories. Small businesses, defined as those with fewer than 100 workers, now employ nearly 60 percent of the work force and are expected to generate half of all new jobs between now and the year 2000. Some 1.2 million small firms have opened their doors over the past six years of economic growth, and 1989 will see an additional 200,000 entrepreneurs striking off on their own. Too many of these pioneers, however, will blaze ahead unprepared. Idealists will overestimate the clamor for their products or fail to factor in the competition. Nearly everyone will underestimate, often fatally, the capital that success requires. Midcareer executives, forced by a takeover or a restructuring to quit the corporation and find another way to support themselves, may savor the idea of being their own boss but may forget that entrepreneurs must also, at least for a while, be bookkeeper and receptionist, too. According to Small Business Administration data,24 of every 100 businesses starting out today are likely to have disappeared in two years, and 27 more will have shut their doors four years from now. By 1995,more than 60 of those 100 start-ups will have folded. A new study of 3,000 small businesses, sponsored by American Express and the National Federation of Independent Business, suggests slightly better odds: Three years after start-up, 77 percent of the companies surveyed were still alive. Most credited their success in large part to having picked a business they already were comfortable in. Eighty percent had worked with the same product or service in their last jobs. Thinking through an enterprise before the launch is obviously critical. But many entrepreneurs forget that a firm's health in its infancy may be little indication of how well it will age. You must tenderly monitor its pulse. In their zeal to expand, small-business owners often ignore early warning signs of a stagnant market or of decaying profitability. They hopefully pour more and more money into the enterprise, preferring not to acknowledge eroding profit margins that mean the market for their ingenious service or product has evaporated, or that they must cut the payroll or vacate their lavish offices. Only when the financial well runs dry do they see the seriousness of the illness, and by then the patient is usually too far gone to save. Frequent checks of your firm's vital signs will also guide you to a sensible rate of growth. To snatch opportunity, you must spot the signals that it is time to conquer new markets, add products or perhaps franchise your hot idea.

单选题男性患者，60岁，慢性阻塞性肺病15年，近1周咳喘加重，紫绀明显，烦躁，血气分析：pH7．4、PaO 2 40mmHg、PatCO 2 70mmHg，进行氧疗应采用