首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   162664篇
  免费   47147篇
  国内免费   4736篇
耳鼻咽喉   2656篇
儿科学   5187篇
妇产科学   1483篇
基础医学   26538篇
口腔科学   6428篇
临床医学   21407篇
内科学   35409篇
皮肤病学   9052篇
神经病学   17383篇
特种医学   6736篇
外国民族医学   21篇
外科学   22567篇
综合类   12089篇
现状与发展   29篇
一般理论   30篇
预防医学   9612篇
眼科学   3966篇
药学   14777篇
  67篇
中国医学   4957篇
肿瘤学   14153篇
  2024年   196篇
  2023年   1079篇
  2022年   2820篇
  2021年   5142篇
  2020年   7499篇
  2019年   12927篇
  2018年   12508篇
  2017年   13608篇
  2016年   14527篇
  2015年   15717篇
  2014年   16591篇
  2013年   17059篇
  2012年   11596篇
  2011年   11806篇
  2010年   13833篇
  2009年   9580篇
  2008年   7630篇
  2007年   6134篇
  2006年   5819篇
  2005年   5007篇
  2004年   3964篇
  2003年   3906篇
  2002年   3493篇
  2001年   2464篇
  2000年   2089篇
  1999年   1525篇
  1998年   854篇
  1997年   741篇
  1996年   645篇
  1995年   571篇
  1994年   550篇
  1993年   373篇
  1992年   396篇
  1991年   361篇
  1990年   302篇
  1989年   283篇
  1988年   188篇
  1987年   203篇
  1986年   150篇
  1985年   103篇
  1984年   63篇
  1983年   42篇
  1982年   48篇
  1981年   41篇
  1980年   29篇
  1979年   17篇
  1978年   8篇
  1975年   7篇
  1973年   11篇
  1972年   8篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
The present paper deals with a developing training element in cognitive behaviour therapy (CBT), the self‐practice of therapeutic techniques and the self‐exploration of the person of the therapist. Initially, the current status of this training element in CBT is discussed, and a short note on its terminology is presented. Then an overview of the most important objectives of self‐practice and self‐reflection in CBT, and the concepts and methods of practice of this element is given. The concepts focus on two major aims, the self‐exploration of the person of the therapist within and beyond his or her therapeutic practice, and the self‐application of therapeutic techniques (= self‐practice). In the second part of the paper empirical studies related to the outcome of self‐reflection and self‐practice on the development of the therapist and her or his therapeutic practice are reviewed. The few empirical studies show that trainees experience in their own view substantial professional and personal gains from this training tool, with the professional impact being more important than the personal one. The most important outcomes evaluated by subjective data from the trainees are improvements in self‐insight and self‐awareness and a better understanding of the therapist's role and the therapeutic change process. Additionally, a better understanding of CBT methods and of general therapeutic skills, such as empathy and role‐taking‐competencies, are reported by the trainees. The paper comes to the conclusion that self‐exploration and self‐practice are important components of CBT training. Consequences and recommendations for its integration into training courses for CBT are discussed as well as the necessity for more research in this area. Copyright © 2002 John Wiley & Sons, Ltd.  相似文献   
82.
T C Liou  X Z Lin  T T Chang  C Y Lin  P W Lin  Y T Jin  C Y Yu 《Pancreas》1992,7(2):251-256
A 61-year-old man experienced four bouts of pancreatitis in 1 year. Detailed history taking and a series of examinations, including sonography, computed tomography scan, and endoscopic retrograde cholangiopancreatography (ERCP), revealed pancreas divisum on the first admission. He was treated conservatively. However, repeated ERCP on the fourth admission, 1 year later, showed a small filling defect in the tail of the pancreatic duct. A distal pancreatectomy was carried out. Pathological studies revealed a small papillary adenocarcinoma (1.5 x 1.0 x 0.5 cm) confined to the pancreatic duct grossly with minimal parenchymal invasion microscopically. He has been free from cancer and pancreatitis for 13 months since the operation.  相似文献   
83.
取32只2~3个月的BALB/C小白鼠,随机分为4组,每组8只,第1组为对照组,其余3个组为实验组,实验组小白鼠左腿皮下注射苯0.3ml(15ml/kg体重).注射后分别于24h,48h,72h脱颈处死。观察中毒前、后末梢血象、骨髓细胞、骨髓细胞构成的变化。结果表明,苯中毒时骨髓变化先于末梢血象的变化,骨髓的病变为造血细胞变性、坏死,大量毛细血管扩张、充血,骨髓细胞构成降低,而且骨髓细胞构成中细胞成分降低早于外周血粒细胞减少。  相似文献   
84.
Thrombocytopenia is a frequent finding following living donor hepatectomy. It appears more pronounced in right graft donors than in left graft donors. This study analyzed postoperative thrombocytopenia in 20 living liver donors and examined the change of endogenous thrombopoietin (TPO) in its recovery. Platelet count, TPO level, fibrinogen degradation product (FDP), and D-Dimer were measured before surgery and on postoperative days (PODs) 1, 2, 3, 5, 7, and 14. Concurrently, liver and spleen volumes were calculated by computed tomography. Platelet count on POD 3 was significantly lower in right graft donors than in left graft donors (13.0 +/- 3.7 x 10(4)/microL vs. 16.8 +/- 4.0 x 10(4)/microL, P = 0.039) but recovered by POD 7 in all donors. Postoperative elevations of FDP and D-Dimer were significantly higher in right graft donors than in left graft donors. TPO level rose immediately after surgery, peaked on POD 5 in left graft donors and on POD 7 in right graft donors, and fell nearly to preoperative levels by POD 14. Postoperative TPO level per liver volume was significantly higher in right graft donors than in left graft donors. In conclusion, thrombocytopenia following living donor hepatectomy resolved within the first week regardless of graft type and was mainly associated with increasing consumption of circulating platelets, possibly due to intrahepatic and splenic congestion. With a reduced number of circulating platelets, TPO level rapidly increases. Also, with reduced consumption of platelets related to recovery from surgery, thrombocytopenia should resolve. As a consequence, TPO level would be expected to fall.  相似文献   
85.
目的避免或减少老年人植入心脏起搏器术后疗养康复过程中起搏器故障和相关疾病的发生。积极治疗基础疾病,改变其不良症状,并通过心理治疗改善不良心理情绪,使其增强自信,提高生活质量。方法入院后,详细了解安置起搏器的时间、类型及工作情况,全面掌握其身体状况和心理特点,为其制定合理的疗养计划。结果疗养期结束后,疗养员无一例出现起搏器故障和发生相关疾病;基础疾病及不良症状得到进一步控制,心理不良情绪得到进一步控制,基本达到了疗养的目的。结论疗养院医务人员应全面了解起搏器的类型及特性;掌握安置起搏器的适应症和容易出现的病症;掌握此类疗养员的身体情况和心理特点,制定合理的疗养计划并按计划认真予以实施,是保证老年人植入心脏起搏器疗养员能够顺利完成疗养生活的有效措施。  相似文献   
86.
目的:探讨奎的平、氯氮平对精神分裂症的疗效及副作用。方法:80例患者随机分为两组,分别应用奎的平或氯氮平治疗6周,采用四级临床疗效评定标准、阳性症状与阴性症状量表(PANSS)、副反应量表(TESS)评定疗效及副反应。结果:奎的平组有效率87.5%,氯氮平组有效率82.5%。治疗第一周末,奎的平组PANSS量表总分较治疗前差异有显著性(P<0.05)。奎的平组副反应低于氯氮平组。结论:奎的平与氯氮平疗效相似,但奎的平起效较快,副反应较轻。  相似文献   
87.
白晋  宋建星 《中国临床康复》2006,10(21):141-144
目的:明确阴股沟皮瓣的显微解剖基础,为临床应用此皮瓣提供解剖依据。资料来源:应用计算机检索Medline1991-01/2005-01的相关文章,检索词“pudendal-thigh flap,micranatomy”,并限定文章语言种类为English。并且手工检索《中文科技资料目录一医药卫生)1998-01/2005-01的相关文章,检索途径:分类途径。 资料选择:对资料进行初审,并查看每篇文献后的引文。纳入标准:①随机对照的基础及临床试验。②无论是否为单盲,双盲或非盲法。排除标准:重复性研究或综述性文章。 资料提炼:共检索到42篇相关文章,21篇文献符合纳入标准,排除的21篇文献为内容陈旧或重复。 资料综合:阴股沟区动脉血液供应充足,并且位置均比较恒定,尤以阴部外动脉最为恒定。静脉回流丰富,神经支配可靠。阴股沟皮瓣是位于股内侧上方与会阴部之间的无毛区域,上界平耻骨联合上缘水平,下界为两侧坐骨结节连线,内侧界为阴囊或大阴唇外侧缘,外侧界为股内侧皱襞,自阴囊(唇)外侧缘向大腿内上方延伸约5cm包括的范围。该区动脉血液供应丰富,计有阴部外动脉,闭孔动脉前皮支,阴囊(唇)后动脉的外侧支,旋股内侧动脉的皮支,股内侧的主要动脉支,以及来自阴部内动脉的肛动脉(直肠下动脉)等,并且位置均比较恒定,其中尤其以阴部外动脉最为恒定。在阴股沟区,阴囊(唇)后动脉与旋股内动脉、闭孔动脉前支及阴部外动脉的分支存在广泛的吻合并在内收肌内侧以上的深筋膜层形成血管网。进入阴股沟区的多支血管相互吻合成网。阴股沟区静脉回流丰富,神经支配可靠。 结论:阴股沟皮瓣血运丰富,解剖简便易行,切取方便,供区隐蔽,再造性器官外形及恢复神经感觉均取得较为理想的效果,是一种值得推广的方法。  相似文献   
88.
Gastric mucormycosis involvement is a rare condition that usually occurs in inmunocompromised patients and frequently has a fatal outcome. We report the case of a 73‐year‐old woman admitted to the intensive care unit with severe bleeding after an acute pulmonary disease. Upper endoscopy disclosed wide and deep necrotic ulcers in the body and fundus of the stomach and greenish exudates with the antrum and the duodenum undamaged. Autopsy revealed an invasive mucormycosis and a severe atheromatosis. Several predisposing factors for mucormycosis infection have been reported until now. We postulate that ischemic gastritis could be a predisposing factor for colonization of zygomycete.  相似文献   
89.
90.
本文报告65例双炔失碳酯配伍d1-15甲基PGF_(2α)(以下简称PG)抗早孕结果并与33例丙睾配伍PG抗早孕结果进行比较。结果显示,双炔失碳酯组完全流产59例,占90%;不全流产3例,占5%;失败3例,占5%;总有效率95%。丙睾组完全流产27例,占82%;不全流产6例,占18%;总有效率100%。两组总有效率无显著差异;完全流产率无显著差异;但不全流产率有明显差异(P<0.05)。药流后点滴出血天数,双炔失碳酯组平均为8.1±5.0天;丙睾组平均为18.9±19.1天;两组有明显差别(P<0.05)。双炔失碳酯经阴道给药后无一例发生心、肝、肾功能变化。  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号