单选题患者头痛且空，眩晕耳鸣，腰酸膝软，神疲乏力，滑精，舌红少苔，脉细无力。其证属

单选题Mark Twain once observed that giving up smoking is easy. He knew, because he'd done it hundreds of times himself. Giving up for ever is a trifle more difficult, apparently, and it is well known that it is much more difficult for some people than for others. Why is this so? Few doctors believe any longer that it is simply a question of will power. And for those people that continue to view addicts as merely "weak", recent genetic research may force a rethink. A study conducted by Jacqueline Vink, of the Free University of Amsterdam, used a database called the Netherlands Twin Register to analyze the smoking habits of twins. Her results, published in the Pharmacogenomics Journal, suggest that an individual's degree of nicotine dependence, and even the number of cigarettes he smokes per day, are strongly genetically influenced. The Netherlands Twin Register is a voluntary database that contains details of some 7,000 pairs of adult twins (aged between 15 and 70 ) and 28,000 pairs of childhood twins. Such databases are prized by geneticists because they allow the comparison of identical twins (who share all their genes) with fraternal twins (who share half). In this case, however, Dr. Vink did not make use of that fact. For her, the database was merely a convenient repository of information. Instead of comparing identical and fraternal twins, she concentrated on the adult fraternal twins, most of whom had completed questionnaires about their habits, including smoking, and 536 of whom had given DNA samples to the register. The human genome is huge. It consists of billions of DNA "letters", some of which can be strung together to make sense (the genes) but many of which have either no function, or an unknown function. To follow what is going on, geneticists rely on markers they have identified within the genome. These are places where the genetic letters may vary between individuals. If a particular variant is routinely associated with a particular physical feature or a behavior pattern, it suggests that a particular version of a nearby gene is influencing that feature or behavior. Dr. Vink found four markers which seemed to be associated with smoking. They were on chromosomes 3, 6, 10 and 14, suggesting that at least four genes are involved. Dr. Vink hopes that finding genes responsible for nicotine dependence will make it possible to identify the causes of such dependence. That will help to classify smokers better (some are social smokers while others are physically addicted) and thus enable "quitting" programs to be customized. Results such as Dr. Vink' s must be interpreted with care. Association studies, as such projects are known, have a disturbing habit of disappearing, as it were, in a puff of smoke when someone tries to replicate them. But if Dr. Vink really has exposed a genetic link with addiction, then Mark Twain's problem may eventually become a thing of the past.

单选题A．麝香B．冰片C．苏合香D．石菖蒲

单选题神曲的炮制方法是

单选题A．尿血B．便血、痔血C．崩漏下血D．便血、痔血、崩漏下血

单选题A．活血通经B．补肝肾、强筋骨C．祛风湿D．消痈排脓

单选题具有渗利兼补益特点的药物是( )(2004年第31题)

单选题常用砂仁而不用豆蔻治疗的病证是

单选题A．乌梅丸B．桃核承气汤C．牡蛎散D．补中益气汤

单选题治疗小儿疳积的药物可用 A.山楂 B.神曲 C.麦芽 D.鸡内金

单选题含有汞，且善治水肿胀满，二便不利的药物为A．炉甘石B．轻粉C．硼砂D．硫黄

单选题砒石的正确用量是A．0.1～0.2gB．1～2gC．0.02～0.04gD．0.002～0.004g

单选题三七研末吞服，常用量是

单选题患者饮食过量，脘腹胀满疼痛，最宜选用 A.山楂 B.麦芽 C.神曲 D.莱菔子

单选题A．绞股蓝B．红景天C．刺五加D．沙棘

单选题A．桑螵蛸B．海螵蛸C．莲子D．芡实

单选题具有燥湿消痰，下气宽中作用，可用治梅核气证的药物是

单选题内服治蛔虫腹痛，外洗治疥癣瘙痒的收涩药是

单选题A．孕妇慎用B．阴虚火旺者慎用C．气虚者慎用D．脾胃虚寒者慎用

单选题功能补肺气，补肺阴，补脾气，补脾阴，补肾兼固涩的药物是