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   90210篇
  免费   8526篇
  国内免费   4562篇
耳鼻咽喉   1042篇
儿科学   980篇
妇产科学   1387篇
基础医学   11809篇
口腔科学   2021篇
临床医学   9151篇
内科学   14904篇
皮肤病学   1455篇
神经病学   5434篇
特种医学   3337篇
外国民族医学   17篇
外科学   12013篇
综合类   11998篇
现状与发展   15篇
一般理论   7篇
预防医学   5938篇
眼科学   2239篇
药学   8973篇
  34篇
中国医学   3434篇
肿瘤学   7110篇
  2024年   216篇
  2023年   1046篇
  2022年   2321篇
  2021年   2969篇
  2020年   2270篇
  2019年   2052篇
  2018年   2576篇
  2017年   2300篇
  2016年   2133篇
  2015年   2913篇
  2014年   3585篇
  2013年   3980篇
  2012年   5346篇
  2011年   5547篇
  2010年   3760篇
  2009年   3268篇
  2008年   4072篇
  2007年   4135篇
  2006年   3726篇
  2005年   3263篇
  2004年   2512篇
  2003年   2283篇
  2002年   2077篇
  2001年   5233篇
  2000年   5081篇
  1999年   4405篇
  1998年   1619篇
  1997年   1254篇
  1996年   821篇
  1995年   686篇
  1994年   605篇
  1993年   488篇
  1992年   2012篇
  1991年   1752篇
  1990年   1603篇
  1989年   1545篇
  1988年   1348篇
  1987年   1222篇
  1986年   1087篇
  1985年   910篇
  1984年   603篇
  1983年   468篇
  1982年   258篇
  1981年   189篇
  1980年   141篇
  1979年   284篇
  1978年   88篇
  1974年   79篇
  1973年   99篇
  1972年   78篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
5.
全国名中医天津中医药大学第一附属医院针灸科武连仲教授用多年的临床经验总结概括出针刺的理、法、方、穴、术,其创立的"通经止痛"针刺疗法在临床中疗效佳,武老在治疗坐骨神经痛时,取足太阳膀胱经和足少阳胆经具有走窜针感的经穴为主穴,其配伍精确,组方严密,手法独特,可供临床参考。本文将武老运用"痛经止痛"针刺法治疗坐骨神经痛的经验从"理、法、方、穴、术"方面做浅述。  相似文献   
6.
7.
8.
Levels of the soluble form of the triggering receptor expressed on myeloid cells (sTREM)-1 are elevated in severe sepsis. However, it is not known whether sTREM-1 measurements can distinguish milder bacterial infections from noninfectious inflammation. The present authors studied whether serum sTREM-1 levels differ in community-acquired pneumonia, exacerbations of chronic obstructive pulmonary disease (COPD), asthma and controls, and whether sTREM-1 may be used as a surrogate marker for the need for antibiotics. Serum sTREM-1 levels in 150 patients with pneumonia, COPD and asthma exacerbations and 62 healthy controls were measured. Serum sTREM-1 levels were significantly elevated in pneumonia (median 295.2 ng x mL(-1)), COPD (280.3 ng x mL(-1)) and asthma exacerbations (184.0 ng x mL(-1)) compared with controls (83.1 ng x mL(-1)). Levels were higher in pneumonia and Anthonisen type 1 COPD exacerbations than in type 2 and 3 COPD and asthma exacerbations. The area under the receiver operating characteristics curve for sTREM-1 as a surrogate marker for the need for antibiotics was 0.77. Serum levels of the soluble form of the triggering receptor expressed on myeloid cells-1 were elevated predominantly in pneumonia and Anthonisen type 1 COPD exacerbations versus type 2 and 3 chronic obstructive pulmonary disease exacerbations, asthma and controls. Serum levels of the soluble form of the triggering receptor expressed on myeloid cells-1 has moderate but insufficient accuracy as a surrogate marker for the need for antibiotics in lower respiratory tract infections.  相似文献   
9.
[目的]研究超敏C反应蛋白(hs-CRP)、总抗氧化状态(TAS)联合血脂检测在早老性痴呆症诊断中的应用价值:[方法]选择浦东新区精神卫生中心早老性痴呆专科门诊患者54例,作超敏C反应蛋白、总抗氧化状态与血脂检测。[结果]与对照组比较,实验组hs-CRP、TAS差异非常显著,t1=4.55,t2=2.79,P1〈0.001,P2〈0.01;血脂中甘油三酯、低密度脂蛋白胆固醇、载脂蛋白B、Lp(a)差异显著;t1=3.01,P1〈0.01,t2=2.21,P2〈0.05,t3=2.64,P3〈0.01,t4=1.91,P4〈0.05。[结论]超敏C反应蛋白、总抗氧化状态联合血脂(甘油三酯、低密度脂蛋白胆固醇、载脂蛋白B、Lp(a))检测对实验室诊断早老性痴呆症具有较好敏感性和特异性,临床应用前景乐观。  相似文献   
10.
Signaling of RANK (receptor activator of nuclear factor kappa B) through its ligand RANKL appears critical in osteolysis associated with aseptic loosening (AL). The purpose of this study was to investigate the role of RANK in a murine osteolysis model developed in RANK knockout (RANK(-/-)) mice. Ultra high molecular weight polyethylene (UHMWPE) debris was introduced into established air pouches on RANK(-/-) mice, followed by implantation of calvaria bone from syngeneic littermates. Wild type C57BL/6 (RANK(+/+)) mice injected with either UHMWPE or saline alone were included in this study. Pouch tissues were collected 14 days after UHMWPE inoculation for molecular and histology analysis. Results showed that UHMWPE stimulation induced strong pouch tissue inflammation in RANK(-/-) mice, as manifested by inflammatory cellular infiltration, pouch tissue proliferation, and increased gene expression of IL-1beta, TNFalpha, and RANKL. However, the UHMWPE-induced inflammation in RANK(-/-) mice was not associated with the osteoclastic bone resorption observed in RANK(+/+) mice. In RANK(+/+) mice subjected to UHMWPE stimulation, a large number of TRAP(+) cells were found on the implanted bone surface, where active osteoclastic bone resorption was observed. No TRAP(+) cells were found in UHMWPE-containing pouch tissues of RANK(-/-) mice. Consistent with the lack of osteoclastic activity shown by TRAP staining, no significant UHMWPE particle-induced bone resorption was found in RANK(-/-) mice. A well preserved bone collagen content (Van Gieson staining) and normal plateau surface contour [microcomputed tomography (microCT)] of implanted bone was observed in RANK(-/-) mice subjected to UHMWPE stimulation. In conclusion, this study provides the evidence that UHMWPE particles induce strong inflammatory responses, but not associated with osteoclastic bone resorption in RANK(-/-) mice. This indicates that RANK signaling is essential for UHMWPE particle-induced osteoclastic bone resorption, but does not participate in UHMWPE particle-induced inflammatory response.  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