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   343225篇
  免费   79083篇
  国内免费   9300篇
耳鼻咽喉   6916篇
儿科学   10957篇
妇产科学   5826篇
基础医学   31784篇
口腔科学   8946篇
临床医学   52785篇
内科学   86021篇
皮肤病学   15492篇
神经病学   31437篇
特种医学   12302篇
外国民族医学   40篇
外科学   65467篇
综合类   20857篇
现状与发展   89篇
一般理论   38篇
预防医学   20168篇
眼科学   7868篇
药学   19917篇
  120篇
中国医学   7819篇
肿瘤学   26759篇
  2024年   1038篇
  2023年   6432篇
  2022年   5390篇
  2021年   9911篇
  2020年   14971篇
  2019年   16127篇
  2018年   19226篇
  2017年   20296篇
  2016年   21389篇
  2015年   23361篇
  2014年   31731篇
  2013年   32686篇
  2012年   19178篇
  2011年   19948篇
  2010年   25219篇
  2009年   24455篇
  2008年   15355篇
  2007年   12640篇
  2006年   14715篇
  2005年   11148篇
  2004年   8566篇
  2003年   7207篇
  2002年   6549篇
  2001年   7777篇
  2000年   6609篇
  1999年   6160篇
  1998年   5001篇
  1997年   4725篇
  1996年   4368篇
  1995年   4160篇
  1994年   2847篇
  1993年   2074篇
  1992年   2286篇
  1991年   2235篇
  1990年   1741篇
  1989年   1759篇
  1988年   1561篇
  1987年   1316篇
  1986年   1255篇
  1985年   1006篇
  1984年   743篇
  1983年   688篇
  1982年   608篇
  1981年   497篇
  1980年   431篇
  1979年   457篇
  1978年   443篇
  1977年   486篇
  1975年   329篇
  1972年   389篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
目的探讨不同介入模式在肝癌治疗中的应用分析。方法选取我院肝癌患者130例,将其分为三组,其中,一组患者采用经肝动脉化疗栓塞术(TACE)治疗,二组患者采用肝门静脉化疗栓塞术(PVCE)治疗,三组患者在前两组患者治疗的基础上进行经皮肝穿刺乙醇消融(PEI)治疗,对比分析三组患者的治疗效果。结果一组治疗总有效率为27.5%,二组治疗总有效率为35%,三组治疗总有效率为92%,三组相对于一、二组来说治疗效果更佳,差异具有统计学意义(P0.05)。结论肝动脉化疗栓塞术、肝门静脉化疗栓塞术和经皮肝穿刺乙醇消融治疗相结合治疗肝癌患者,能够有效提高患者治疗效果,稳定患者病情。  相似文献   
92.
Acute lung injury (ALI) caused by systemic inflammatory response remains a leading cause of morbidity and mortality in critically ill patients. Management of patients with sepsis is largely limited to supportive therapies, reflecting an incomplete understanding of the underlying pathophysiology. Furthermore, there have been limited advances in the treatments for ALI. In this study, lung function and a histological analysis were performed to evaluate the impact of transient receptor potential vanilloid‐1 receptor (TRPV1) antagonist (capsazepine; CPZ) on the lipopolysaccharide (LPS)‐induced lung injury in mice. For this, adult mice pre‐treated with CPZ or vehicle received intraperitoneal injections of LPS or saline and 24 hr after, the mice were anaesthetized, and lung mechanics was evaluated. The LPS‐challenged mice exhibited substantial mechanical impairment, characterized by increases in respiratory system resistance, respiratory system elastance, tissue damping and tissue elastance. The pre‐treatment with CPZ prevented the increase in respiratory system resistance and decreased the increase in tissue damping during endotoxemia. In addition, mice pre‐treated with CPZ had an attenuated lung injury evidenced by reduction on collapsed area of the lung parenchyma induced by LPS. This suggests that the TRPV1 antagonist capsazepine has a protective effect on lung mechanics in ALI during endotoxemia and that it may be a target for enhanced therapeutic efficacy in ALI.  相似文献   
93.
94.
Major ursodeoxycholic acid (UDCA)-based therapies for primary biliary cirrhosis (PBC) include UDCA only, or combined with either methotrexate (MTX), corticosteroids (COT), colchicine (COC), or bezafibrate (BEF). As the optimum treatment regimen is unclear and warrants exploration, we aimed to compare these therapies in terms of patient mortality or liver transplantation (MOLT) and adverse events (AE).PubMed, the Cochrane Library, and Scopus were searched for randomized controlled trials up to August 31, 2014. We estimated the hazard ratios (HRs) for MOLT and odds ratios (ORs) for AE. A sensitivity analysis based on the dose of UDCA was also executed.Thirty-one eligible articles were included. Compared with COT plus UDCA, UDCA (HR 0.38, 95% confidence interval [CI] 0.09–1.39), BEF plus UDCA (HR 0.29, 95% CI 0.02–4.83), COC plus UDCA (HR 0.39, 95% CI 0.07–2.25), MTX plus UDCA (HR 0.28, 95% CI 0.05–1.63), or OBS (HR 0.49, 95% CI 0.11–2.01) all provided an increased risk of MOLT. With respect to drug AE profile, although not differing appreciably, BEF plus UDCA was associated with more AEs compared with UDCA (OR 3.16, 95% CI 0.59–20.67), COT plus UDCA (OR 2.27, 95% CI 0.15–33.36), COC plus UDCA (OR 1.00, 95% CI 0.09–12.16), MTX plus UDCA (OR 2.03, 95% CI 0.23–17.82), or OBS (OR 3.00, 95% CI 0.53–20.75). The results of sensitivity analyses were highly consistent with previous analyses.COT plus UDCA was the optimal UDCA-based regimen for both MOLT and AEs. BEF plus UDCA was most likely to cause AEs, whereas monotherapy with UDCA and coadministriation of COT plus UDCA appeared to be associated with the fewest AEs for PBC treatment.  相似文献   
95.
96.
97.
98.
Sonodynamic therapy (SDT) consists of the synergetic interaction between ultrasound and a chemical agent. In SDT, the cytotoxicity is triggered by ultrasonic stimuli, notably through cavitation. The unique features of SDT are relevant in the clinical context more than ever: the need for efficacy, accuracy, and safety while being noninvasive and preserving the patient's quality of life. However, despite the promising results of this technique, only a few clinical reports describe the use of SDT. The objective of this article is to provide an extensive overview of the clinical and preclinical research conducted in vivo on SDT, to identify the limitations, and to detail the developed strategies to overcome them.  相似文献   
99.
Epidermolysis bullosa simplex (EBS) is a skin fragility disorder resulting from mutations of structural proteins in the epidermis. We provide a brief report of long‐term survival and reproduction in a mother with EBS due to keratin 5 (KRT5) c.1429G > A (p.E477K) mutation, which causes a particularly severe form of the disease.  相似文献   
100.
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