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   326540篇
  免费   29251篇
  国内免费   22969篇
耳鼻咽喉   2985篇
儿科学   3452篇
妇产科学   4940篇
基础医学   40060篇
口腔科学   5546篇
临床医学   45601篇
内科学   49924篇
皮肤病学   3121篇
神经病学   18387篇
特种医学   12057篇
外国民族医学   213篇
外科学   33332篇
综合类   50530篇
现状与发展   76篇
一般理论   20篇
预防医学   19908篇
眼科学   9597篇
药学   33095篇
  334篇
中国医学   17641篇
肿瘤学   27941篇
  2024年   1000篇
  2023年   5027篇
  2022年   13070篇
  2021年   16384篇
  2020年   12076篇
  2019年   10854篇
  2018年   11438篇
  2017年   9960篇
  2016年   9394篇
  2015年   14438篇
  2014年   17898篇
  2013年   15489篇
  2012年   23043篇
  2011年   26065篇
  2010年   16177篇
  2009年   12505篇
  2008年   17263篇
  2007年   17256篇
  2006年   17241篇
  2005年   16948篇
  2004年   10765篇
  2003年   9810篇
  2002年   8482篇
  2001年   7489篇
  2000年   8294篇
  1999年   9017篇
  1998年   5475篇
  1997年   5499篇
  1996年   4332篇
  1995年   3924篇
  1994年   3218篇
  1993年   2097篇
  1992年   2827篇
  1991年   2415篇
  1990年   2117篇
  1989年   1861篇
  1988年   1563篇
  1987年   1352篇
  1986年   1107篇
  1985年   912篇
  1984年   528篇
  1983年   373篇
  1982年   242篇
  1981年   238篇
  1980年   188篇
  1979年   221篇
  1978年   82篇
  1977年   89篇
  1974年   102篇
  1973年   83篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
151.
王翠玲 《护理研究》2006,20(11):1016-1017
质量管理是医院生存和发展的战略战术。质量就是生命,质量就是效益,21世纪护理质量的起步要求是护理质量管理者应在缺陷预防和质量持续改进方面做出尝试,护理管理者应在推行精细化管理,强化护理过程控制方面做出努力,以满足广大病人的健康服务需求。1质量发展及其概念1.1护理质量管理的发展阶段美国护理质量管理大体经历了3个历史性发展阶段:20世纪70年代“质量控制阶段”,20世纪80年代“质量保证阶段”,20世纪90年代“质量促进阶段”。质量控制阶段的主要特点:①由质量管理人员发现已出现的质量问题,然后做出处理;②技师评价方式为依照标准…  相似文献   
152.
教师心理健康是学校心理健康教育的重要方面。教师职业的一些特点,如非对称互动、角色问题、工作超负荷、待遇较低等对教师的“理健康有不容忽视的负性影响。应在优化教师工作与生存环境、改善教育管理、提高教师社会地位和待遇、自我调节等方面采取积极的干预以促进教师的心理健康.  相似文献   
153.
We previously reported that lymphatic mapping using isosulfan blue can be used to identify sentinel nodes (SNs). This study was undertaken to evaluate the feasibility of using the SN technique in treating early gastric cancer and to explore its usefulness for minimal invasive surgery. Twenty-three patients with early gastric cancer who underwent SN biopsy were retrospectively evaluated. Based on SN evaluation, individualized surgery was performed in five patients with T1N0M0 gastric cancer. When pathological examination of frozen sections revealed metastasis in SNs, we performed a standard D2 gastrectomy. Laparoscopic local resection was applied when the SN biopsy was negative. Our results showed that the success rate with SN biopsy in early gastric cancer was 100%, as were the accuracy, sensitivity, and specificity. All five patients with early gastric cancer had SNs negative for metastases both by frozen section and by postoperative pathology. Thus, all these patients underwent laparoscopic local resection without extended lymphadenectomy. We conclude that SN biopsy is a useful tool to individualize the operative procedure, and laparoscopic local resection can be safely performed using SN guidance in selected patients with early gastric cancer.  相似文献   
154.
中医药高等院校专业建设应随着社会的进步发展和社会的需求而不断拓宽、延伸其专业领域,本文从中医药高校的专业延伸的必要性、建设原则以及专业延伸的思路等三个方面对中医药高等院校的专业建设工作提出了几点思考。  相似文献   
155.
156.
100例性病患者心理健康状况调查分析   总被引:3,自引:1,他引:2  
目的:探讨性病患者的心理健康状况,为临床治疗和护理提供依据。方法:采用症状自评量表(SCL-90)对100例性病患者的心理健康状况进行测验。结果:100例性病患者SCL-90检测的阳性率为51%,阳性样本因子分居前的是敌对、强迫症状、抑郁、人际敏感。结论:性病患者广泛存在的心理问题,在药用治疗的同时应注意心理方面的治疗和疏导。  相似文献   
157.
Prior findings led us to hypothesize that West Nile virus (WNV) preferentially transports along motor axons instead of sensory axons. WNV is known to undergo axonal transport in cell culture and in infected hamsters to infect motor neurons in the spinal cord. To investigate this hypothesis, WNV was injected directly into the left sciatic nerve of hamsters. WNV envelope-staining in these hamsters was only observed in motor neurons of the ipsilateral ventral horn of the spinal cord, but not in the dorsal root ganglion (DRG). To evaluate the consequence of motor neuron infection by WNV, the authors inoculated wheat germ agglutinin—horseradish peroxidase (WGA-HRP) 9 days after WNV sciatic nerve injection, and stained the spinal cord and the DRG for HRP activity 3 days later. The degree of HRP-staining in DRG was the same in WNV- and sham-infected animals, but the HRP-staining in the motor neuron in the ventral horn was considerably less for WNV-infected hamsters. To investigate the mechanism of WNV transport, hamsters were treated with colchicine, an inhibitor of membranous microtubule-mediated transport. The intensity of the WNV-stained area in the spinal cord of colchicine-treated hamsters at 6 days after WNV infection were significantly reduced (P≤.05) compared to the placebo-treated hamsters. These data suggest that WNV is preferentially transported through the motor axons, but not the sensory axons, to subsequently infect motor neurons and cause motor weakness and paralysis.  相似文献   
158.
159.
Ganoderma sinensis has been used widely in Oriental countries for the prevention and treatment of various diseases including cancer. Previous studies have shown that the lipid extract from Ganoderma exhibits direct cytotoxicity against tumor cells. Here, it is reported that the lipid extract from germinating G. sinensis spores, at lower concentrations that have no direct tumoricidal activity, induce potent antitumor immune responses in human monocytes/macrophages. Upon stimulation with the lipid extract, monocytes/macrophages exhibited markedly increased production of proinflammatory cytokines and surface expression of costimulatory molecules. Conditioned medium from stimulated cells effectively suppressed the growth of tumor cells. Apparently, the lipid extract triggered macrophage activation via a mechanism different from that associated with LPS. Moreover, it was observed that the lipid extract could partially re‐establish the antitumor activity of the immunosuppressive tumor‐associated macrophages. These results indicated that in addition to its direct tumoricidal activity, the lipid extract from G. sinensis spores could exert antitumor activity by stimulating the activation of human monocytes/macrophages. Copyright © 2008 John Wiley & Sons, Ltd.  相似文献   
160.
Purpose  There has been increasing interest in the occupational health of workers in small enterprises, especially in developing countries. This study examines the association between psychosocial job characteristics and fatigue, and attempts to identify risk factors for fatigue among workers of small enterprises in southern Taiwan. Methods  A structured questionnaire was administered to workers receiving regular health examinations between August 2005 and January 2006. The questionnaire collected demographic information and data on working conditions, personal health status and life styles. It also collected information on psychosocial job characteristics, fatigue and psychological distress using three instruments. Results  A total of 647 workers with mean age of 43.7 were completed. Probable fatigue was found in 34.6% of the sample. Fatigue was found by multiple logistic regressions to be associated with the lack of exercise, working in shifts, depression score and lack of social support at workplace. Conclusions  This study found associations between life style, psychosocial job characteristics and fatigue. Because the high prevalence of probable fatigue was found in such small enterprises, the authors suggest that a short interview with some quick questionnaires in health checkup for these small enterprise workers are helpful to early detect psychosocial and fatigue problems.  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