全文获取类型
收费全文 | 20408篇 |
免费 | 2028篇 |
国内免费 | 701篇 |
专业分类
耳鼻咽喉 | 66篇 |
儿科学 | 242篇 |
妇产科学 | 133篇 |
基础医学 | 1787篇 |
口腔科学 | 727篇 |
临床医学 | 2921篇 |
内科学 | 4138篇 |
皮肤病学 | 204篇 |
神经病学 | 1339篇 |
特种医学 | 541篇 |
外国民族医学 | 2篇 |
外科学 | 986篇 |
综合类 | 2945篇 |
现状与发展 | 4篇 |
一般理论 | 1篇 |
预防医学 | 1940篇 |
眼科学 | 183篇 |
药学 | 3284篇 |
8篇 | |
中国医学 | 1098篇 |
肿瘤学 | 588篇 |
出版年
2023年 | 260篇 |
2022年 | 294篇 |
2021年 | 702篇 |
2020年 | 760篇 |
2019年 | 719篇 |
2018年 | 698篇 |
2017年 | 745篇 |
2016年 | 796篇 |
2015年 | 793篇 |
2014年 | 1194篇 |
2013年 | 1611篇 |
2012年 | 1129篇 |
2011年 | 1168篇 |
2010年 | 956篇 |
2009年 | 924篇 |
2008年 | 840篇 |
2007年 | 847篇 |
2006年 | 733篇 |
2005年 | 712篇 |
2004年 | 598篇 |
2003年 | 632篇 |
2002年 | 515篇 |
2001年 | 487篇 |
2000年 | 422篇 |
1999年 | 411篇 |
1998年 | 338篇 |
1997年 | 306篇 |
1996年 | 269篇 |
1995年 | 306篇 |
1994年 | 284篇 |
1993年 | 222篇 |
1992年 | 223篇 |
1991年 | 214篇 |
1990年 | 198篇 |
1989年 | 185篇 |
1988年 | 194篇 |
1987年 | 159篇 |
1986年 | 133篇 |
1985年 | 201篇 |
1984年 | 178篇 |
1983年 | 128篇 |
1982年 | 135篇 |
1981年 | 112篇 |
1980年 | 94篇 |
1979年 | 72篇 |
1978年 | 52篇 |
1977年 | 55篇 |
1976年 | 43篇 |
1975年 | 25篇 |
1974年 | 15篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
目的 了解我国老年人中医证候分布特征,为中医药辨治老年人提供参考依据。方法 系统检索中国知识基础设施(CNKI)、中文科技期刊数据库(CCD)、万方数据资源系统数据库(CSPD),纳入研究对象为老年人的临床流行病学调查研究文献,对其调查目的、调查疾病及调查结果等进行描述统计。结果 ①最终纳入168篇文献,其中2010至2020年之间发表138篇(82.14%);调查地区涵盖全国28个省市自治区,共纳入43948例老年人,累计覆盖340个研究中心;②主要研究结果显示,老年人中医证候阴虚阳亢证(10.05%)>血瘀证(9.5%)>痰浊(湿)证(8.91%)>阴阳两虚证(4.98%)>痰瘀互结证(4.96%);单元证分布阴虚证(14.70%)>痰证(11.22%)>气虚证(7.15%)>肾虚证(4.72%)>血瘀证(4.18%);涉及病变脏腑肾>肝>脾>肺>心。结论 根据统计结果,可以看出老年人证候分布虚证多于实证,虚证中又以阴虚证、气虚证最为多见,实证常见血瘀证、痰浊(湿)证等,且多见痰瘀互结证;老年人五脏皆损,其中又以肾、肝、脾功能失调最为突出。 相似文献
2.
3.
4.
Aldo Cannata Silvia Cantoni Antonio Sciortino Giuseppe Bruschi Claudio Francesco Russo 《Journal of the American College of Cardiology》2021,77(18):2323-2334
Mechanical intravascular hemolysis is frequently observed following procedures on heart valves and uncommonly observed in native valvular disease. In most cases, its severity is mild. Nevertheless, it can be clinically significant and even life threatening, requiring multiple blood transfusions and renal replacement therapy. This paper reviews the current knowledge on mechanical intravascular hemolysis in valvular disease, before and after correction, focusing on pathophysiology, approach to diagnosis, and impact of other hematological conditions on the resultant anemia. The importance of a multidisciplinary management is underscored. Laboratory data are provided about subclinical hemolysis that is commonly observed following the implantation of surgical and transcatheter valve prostheses and devices. Finally, clinical scenarios are reviewed and current medical and surgical treatments are discussed, including alternative options for inoperable patients. 相似文献
5.
Laura Heil Laura Maltry Sebastian Lehmann Daniel Heil Christoph Lehmann Stefan Kopp 《Cranio : the journal of craniomandibular practice》2021,39(1):35-46
ABSTRACT Objective: The purpose of this study was to examine the influence of a total knee arthroplasty (TKA) on linked cranial and caudal structures. Methods: Thirty-five (14f/21m) subjects participated in this study: 15 subjects (9f, 6m) pre- and post- TKA and a control group of 20 subjects (5f, 15m). The measurements included: jaw condyle position and movement, back scan, plantar pressure distribution, and body sway. Results: There were no significant differences in electronic position analysis of the jaw; however, the protrusion of the TKA group improved (p = 0.001). The test group had a more anteriorly inclined thoracic spine and a less pronounced lumbar lordosis. Before and after surgery, the body sway in the test group was larger. Conclusion: The TKA affected most prominently the static mechanisms of the postural control and the spine position. The trajectories of the mandible during protrusion also changed slightly. 相似文献
6.
目的:探讨健脾益肝方对非酒精性脂肪性肝病(NAFLD)患者脂肪分布及脂代谢的影响。方法:将80例NAFLD患者随机分为对照组和治疗组各40例。两组患者均在多学科联合管理下给予个体化的饮食、运动等生活方式指导,治疗组患者在此基础上加用健脾益肝方,疗程均为3个月。通过生物电阻抗技术测量患者治疗前后脂肪质量及分布,定期监测肝肾功能、血脂指标。比较两组患者肥胖、脂肪分布、血脂指标变化。结果:治疗组患者有效率为97.5%,明显高于对照组的82.5%,差异有统计学意义(P<0.05);治疗组患者BMI、BFP、WHR、TC、TG及LDL-C水平明显低于对照组,差异有统计学意义(均P<0.05);治疗组患者躯干及内脏脂肪沉积改善明显优于对照组,差异有统计学意义(均P<0.05)。结论:生活方式干预联合健脾益肝方治疗NAFLD患者能显著改善患者的肥胖及脂代谢紊乱,并且与躯干和内脏脂肪质量的下降密切相关。 相似文献
7.
Kensuke Kudou Hiroshi Saeki Yuichiro Nakashima Shun Sasaki Tomoko Jogo Kosuke Hirose Qingjiang Hu Yasuo Tsuda Koichi Kimura Ryota Nakanishi Nobuhide Kubo Koji Ando Eiji Oki Tetsuo Ikeda Yoshihiko Maehara 《American journal of surgery》2019,217(4):757-763
Background
There were few studies assessed the postoperative sarcopenia in patients with cancers. The objective of present study was to assess whether postoperative development of sarcopenia could predict a poor prognosis in patients with adenocarcinoma of esophagogastric junction, (AEG) and upper gastric cancer (UGC).Methods
Patients with AEG and UGC who were judged as non-sarcopenic before surgery were reassessed the presence of postoperative development of sarcopenia 6 months after surgery. Patients were divided into the development group or non-development group, and clinicopathological factors and prognosis between these two groups were analyzed.Results
The 5-year overall survival rates were significantly poorer in the development group than non-development group (68.0% vs. 92.6%, P?=?0.0118). Multivariate analyses showed that postoperative development of sarcopenia was an independent prognostic factor for poor overall survival (P?=?0.0237).Conclusions
Postoperative development of sarcopenia was associated with a poor prognosis in patients with AEG and UGC. 相似文献8.
9.