全文获取类型
收费全文 | 374655篇 |
免费 | 35370篇 |
国内免费 | 23549篇 |
专业分类
耳鼻咽喉 | 3578篇 |
儿科学 | 5589篇 |
妇产科学 | 2610篇 |
基础医学 | 28051篇 |
口腔科学 | 6587篇 |
临床医学 | 47256篇 |
内科学 | 39206篇 |
皮肤病学 | 4253篇 |
神经病学 | 11101篇 |
特种医学 | 13409篇 |
外国民族医学 | 78篇 |
外科学 | 35163篇 |
综合类 | 93269篇 |
现状与发展 | 109篇 |
一般理论 | 7篇 |
预防医学 | 39679篇 |
眼科学 | 6133篇 |
药学 | 44799篇 |
459篇 | |
中国医学 | 32000篇 |
肿瘤学 | 20238篇 |
出版年
2024年 | 1670篇 |
2023年 | 5082篇 |
2022年 | 12859篇 |
2021年 | 16267篇 |
2020年 | 13723篇 |
2019年 | 8550篇 |
2018年 | 9042篇 |
2017年 | 10725篇 |
2016年 | 8839篇 |
2015年 | 14966篇 |
2014年 | 19567篇 |
2013年 | 22295篇 |
2012年 | 32068篇 |
2011年 | 34288篇 |
2010年 | 28693篇 |
2009年 | 25515篇 |
2008年 | 27190篇 |
2007年 | 26166篇 |
2006年 | 23907篇 |
2005年 | 20435篇 |
2004年 | 13895篇 |
2003年 | 11612篇 |
2002年 | 9193篇 |
2001年 | 8413篇 |
2000年 | 7257篇 |
1999年 | 4544篇 |
1998年 | 2337篇 |
1997年 | 2300篇 |
1996年 | 1840篇 |
1995年 | 1723篇 |
1994年 | 1518篇 |
1993年 | 946篇 |
1992年 | 1120篇 |
1991年 | 874篇 |
1990年 | 760篇 |
1989年 | 681篇 |
1988年 | 573篇 |
1987年 | 522篇 |
1986年 | 459篇 |
1985年 | 353篇 |
1984年 | 174篇 |
1983年 | 149篇 |
1982年 | 110篇 |
1981年 | 72篇 |
1980年 | 51篇 |
1979年 | 57篇 |
1963年 | 17篇 |
1962年 | 18篇 |
1956年 | 16篇 |
1955年 | 16篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
陈培刚 《中华医学教育杂志》2002,(1):3-4
随着科技进步的加速,现代医学教育创新势在必行.本文针对这一现状,阐述了现代医学教育创新的内涵,分析了现代医学教育创新面临的问题,探讨了医学院校如何进行创新教育,介绍了山西医科大学对实施现代医学教育创新的一些具体措施. 相似文献
62.
后发障是儿童白内障最常见的并发症,是导致术后视力下降的主要原因,故降低后发障的发生率对提高术后视力及减少弱视的发生非常重要,以往文献报道大多是术后行ND-YAG激光后囊切开术来治疗后发障。笔者近年对儿童白内障采用白内障摘除人工晶体植入联合后囊连续环形撕囊术预防人工晶体术后后囊混浊,效果肯定,报告如下。 相似文献
63.
陈子祺 《中国医疗器械信息》2005,11(3):48-49
从2004年下半年到2005年上半年,世界超声联合会以及中华医学会超声学会共同举办了5次较大规模的超声学术研讨会,上海麦迪逊医疗器械有限公司作为唯一的赞助商承担了全部研讨会的组织运行工作,投入了很大的人力、财力、物力,但是在研讨会上却没有看到他们任何与商业有关的活动.上海麦迪逊的这种作法引起了我的注意,于是我找来麦迪逊公司的简单资料: 相似文献
64.
This paper explores health policy options in response to economiccrises in developing countries. The paper is based upon thepremise that policy is best pursued within a broad understandingof the determinants of health of populations. To provide anempirical base for analysis, the health status and health caresystems of China and India are compared. A conceptual frameworkon the determinants of the health status of populations is thendeveloped, incorporating both the performance of health caresystems and non-medical factors which influence health. Usingthe China and India experiences, the paper reviews the strengthsand weaknesses of traditional tools used in the analysis ofhealth policy. Significant policy change, it is argued, is bestimplemented through structural change of several health caresystem components simultaneously. Health policy analysis, itis further argued, must consider the broader political economyof the society. Moreover, there remain many imperfectly understoodsociocultural aspects of behaviour which enable some familiesto produce good health despite economic constraints. The paperconcludes that economic crisis presents an opportunity for astructural review of a society's health systems. Health policyoptions in response to economic crisis cannot be confined tothe health care sector. Rather, health policy should be viewedas only one, perhaps important, element of a package of socioeconomicpolicy options. Critical to policy choices are reliable informationon the condition of the poor and high political priority tominimize the adverse impact of economic crisis on the health,nutrition and social welfare of disadvantaged groups. 相似文献
65.
66.
67.
Xiaoguang Chen Yi Li Lei Wang Mark Katakowski Lijie Zhang Jieli Chen Yongxian Xu Subhash C. Gautam Michael Chopp 《Neuropathology》2002,22(4):275-279
Intravenous administration of human bone marrow stromal cells (hMSCs) after middle cerebral artery occlusion (MCAo) in rats provides functional benefit. We tested the hypothesis that these functional benefits are derived in part from hMSC production of growth and trophic factors. Quantitative sandwich enzyme‐linked immunosorbent assay (ELISA) of hMSCs cultured with normal and MCAo brain extracts were performed. hMSCs cultured in supernatant derived from ischemic brain extracts increased production of brain‐derived neurotrophic factor (BDNF), nerve growth factor (NGF), vascular endothelial growth factor (VEGF) and hepatocyte growth factor (HGF). These neurotrophins and angiogenic growth factors increased in a post‐ischemia time‐dependent manner. The hMSC capacity to increase expression of growth and trophic factors may be the key to the benefit provided by transplanted hMSCs in the ischemic brain. 相似文献
68.
随着工业化进程的加速及交通事故的增加,胸部创伤日渐增多。国内报道在45 569例创伤中,胸部创伤占1·47%[1],其中肋骨骨折非常常见。随着螺旋CT检查临床应用日趋广泛,其高敏性、快速成像的特性及强大的后处理功能越来越在肋骨骨折中显现重要作用。本文对53例肋骨骨折患者的16层 相似文献
69.
Guerard W. Byrne Johannes M. Schirmer David N. Fass Sumeet S. Teotia Walter K. Kremers Hui Xu Bashoo Naziruddin Henry D. Tazelaar John S. Logan Christopher G. A. McGregor 《American journal of transplantation》2005,5(5):1011-1020
Microvascular thrombosis is a prominent feature in cardiac delayed xenograft rejection (DXR). We investigated the impact of warfarin or low-molecular-weight heparin (LMWH) anti-coagulation on xenograft function using a heterotopic pig-to-primate model. Donor hearts were from CD46 transgenic pigs and baboon immunosuppression included tacrolimus, sirolimus, anti-CD20 and TPC, an alpha-galactosyl-polyethylene glycol conjugate. Three groups of animals were studied. Group 1 (n = 9) was treated with warfarin, Group 2 (n = 13) with LMWH and Group 3, received no anti-coagulant drugs. The median duration of xenograft function was 20 days (range 3-62 days), 18 days (range 5-109 days) and 15 days (range 4-53 days) in Groups 1 to 3 respectively. Anti-coagulation achieved the targeted international normalized prothrombin ratio (INR) and anti-factor Xa levels consistent with effective in vivo therapy yet, no significant impact on median xenograft function was observed. At rejection, a similar histology of thrombosis and ischemia was apparent in each group and the levels of fibrin deposition and platelet thrombi in rejected tissue was the same. Anti-coagulation with warfarin or LMWH did not have a significant impact on the onset of DXR and microvascular thrombosis. However, a role for specific anti-coagulant strategies to achieve long-term xenograft function cannot be excluded. 相似文献
70.
Lin Bo Wang Jian Guo Shen Li Feng Dong Chao Yang Xu Wen Jun Chen Shu Duo Xie Xiang Yang Song Ning Dai Xiao Ming Yuan 《Journal of gastrointestinal surgery》2008,12(8):1359-1363
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