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   325165篇
  免费   11391篇
  国内免费   1215篇
耳鼻咽喉   3506篇
儿科学   9171篇
妇产科学   5583篇
基础医学   40513篇
口腔科学   5122篇
临床医学   26713篇
内科学   57830篇
皮肤病学   5411篇
神经病学   29182篇
特种医学   17021篇
外科学   48484篇
综合类   3270篇
现状与发展   4篇
一般理论   42篇
预防医学   26736篇
眼科学   6572篇
药学   22387篇
中国医学   2185篇
肿瘤学   28039篇
  2023年   807篇
  2022年   586篇
  2021年   4252篇
  2020年   2521篇
  2019年   3581篇
  2018年   25672篇
  2017年   20351篇
  2016年   23440篇
  2015年   7123篇
  2014年   8223篇
  2013年   9562篇
  2012年   19930篇
  2011年   33014篇
  2010年   25527篇
  2009年   17391篇
  2008年   27961篇
  2007年   29849篇
  2006年   8416篇
  2005年   9522篇
  2004年   9844篇
  2003年   9965篇
  2002年   7430篇
  2001年   4188篇
  2000年   4045篇
  1999年   3000篇
  1998年   1279篇
  1997年   1064篇
  1996年   767篇
  1995年   807篇
  1994年   694篇
  1993年   628篇
  1992年   1364篇
  1991年   1390篇
  1990年   1284篇
  1989年   1201篇
  1988年   1086篇
  1987年   1085篇
  1986年   841篇
  1985年   894篇
  1984年   665篇
  1983年   535篇
  1982年   396篇
  1981年   378篇
  1980年   361篇
  1979年   520篇
  1978年   429篇
  1977年   306篇
  1976年   301篇
  1974年   355篇
  1973年   337篇
排序方式: 共有10000条查询结果,搜索用时 62 毫秒
1.
2.
3.
Journal of Immigrant and Minority Health - Little attention has been paid to online health information seeking (OHIS) among immigrants residing in rural areas. This study examines the intensity of...  相似文献   
4.
Post-induction hypotension is common and associated with postoperative complications. We hypothesised that pneumatic leg compression reduces post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy. In this double-blind randomised study, patients were allocated randomly to the pneumatic leg compression group (n = 50) or control (n = 50). In the intervention group, pneumatic leg compression was initiated before induction of anaesthesia. In the control group, pneumatic leg compression was initiated 20 min after anaesthesia induction. The primary outcome was the incidence of post-induction hypotension in these groups. Post-induction hypotension was defined as systolic blood pressure < 90 mmHg during the first 20 min after induction. Haemodynamic variables and area under the curve of post-induction systolic blood pressure over time were assessed. Complications associated with pneumatic leg compression were recorded, including: peripheral neuropathy; compartment syndrome; extensive bullae beneath the leg sleeves; and pulmonary thromboembolism. The incidence of post-induction hypotension decreased in the pneumatic leg compression group compared with that in the control group; 5 (10%) vs. 29 (58%), respectively, p < 0.001. In the pneumatic leg compression group, the lowest systolic, diastolic and mean blood pressures 20 min after induction of anaesthesia were significantly greater than the control group. Pneumatic leg compression resulted in an increased area under the curve of systolic blood pressure in the first 20 min after induction, p = 0.001. There were no pneumatic leg compression-related complications. Pneumatic leg compression reduced post-induction hypotension in elderly patients undergoing robot-assisted laparoscopic prostatectomy, suggesting that it is an effective and safe intervention to prevent post-induction hypotension among elderly patients undergoing general anaesthesia.  相似文献   
5.
6.
Lee  Sang-Ahm  Kim  Soo Jeong  Lee  So Young  Kim  Hyo Jae 《Sleep & breathing》2022,26(1):251-257
Sleep and Breathing - The presence of periodic limb movements during sleep (PLMS) varies among patients with obstructive sleep apnea (OSA) undergoing treatment with continuous positive airway...  相似文献   
7.
Graefe's Archive for Clinical and Experimental Ophthalmology - To compare visual outcomes between two types of mix-and-match implanted trifocal extended-depth-of-focus (EDoF) and trifocal...  相似文献   
8.
9.
Stickler syndrome is a genetic disorder of connective tissue. One of the major symptoms associated with this disorder is an oro-facial malformation, which may cause a submucous cleft or a complete cleft of the hard palate. A 32-year-old man diagnosed with Stickler syndrome and a submucosal cleft palate (SMCP) visited our hospital with a chief complaint of excessive daytime sleepiness. The patient was diagnosed with severe obstructive sleep apnea (OSA), and administration of a polysomnography test revealed an apnea-hypopnea index (AHI) of 30.9 events/hour (h). Auto-titrating continuous positive airway pressure was initiated to control the OSA symptoms and subsequently the patient showed some improvement. However, due to continuous velopharyngeal insufficiency symptoms, intravelar veloplasty was performed. Three months after surgery, the AHI had decreased to 12.4 events/h. Recent studies have described a greater risk for OSA in individuals with cleft palate, than in the general population. The present case demonstrates surgical success in a patient with OSA and SMCP, suggesting that palatal surgery may be considered an optional surgical treatment for OSA patients with SMCP.  相似文献   
10.
Social Psychiatry and Psychiatric Epidemiology - The negative effect of catastrophic financial loss on suicide risk is widely perceived but hardly studied in-depth because of various difficulties...  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