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   132211篇
  免费   43960篇
  国内免费   650篇
耳鼻咽喉   2540篇
儿科学   4822篇
妇产科学   1470篇
基础医学   25240篇
口腔科学   6251篇
临床医学   17081篇
内科学   31131篇
皮肤病学   9376篇
神经病学   17385篇
特种医学   5801篇
外科学   21621篇
综合类   313篇
一般理论   43篇
预防医学   6656篇
眼科学   2695篇
药学   10893篇
中国医学   1612篇
肿瘤学   11891篇
  2023年   363篇
  2022年   265篇
  2021年   2664篇
  2020年   5931篇
  2019年   11834篇
  2018年   11555篇
  2017年   12470篇
  2016年   13572篇
  2015年   14307篇
  2014年   14721篇
  2013年   15653篇
  2012年   10020篇
  2011年   9369篇
  2010年   11705篇
  2009年   7728篇
  2008年   5829篇
  2007年   4359篇
  2006年   3897篇
  2005年   3323篇
  2004年   2963篇
  2003年   2541篇
  2002年   2272篇
  2001年   1929篇
  2000年   1642篇
  1999年   966篇
  1998年   396篇
  1997年   280篇
  1996年   245篇
  1995年   215篇
  1994年   183篇
  1993年   166篇
  1992年   353篇
  1991年   350篇
  1990年   294篇
  1989年   273篇
  1988年   260篇
  1987年   258篇
  1986年   195篇
  1985年   172篇
  1984年   126篇
  1983年   127篇
  1982年   73篇
  1981年   68篇
  1979年   85篇
  1978年   73篇
  1975年   51篇
  1974年   62篇
  1973年   56篇
  1972年   59篇
  1970年   48篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
Coates  Laura C.  Mease  Philip  Kronbergs  Andris  Helt  Cameron  Sandoval  David  Park  So Young  Combe  Bernard  Nash  Peter  Deodhar  Atul 《Clinical rheumatology》2022,41(10):3035-3047
Clinical Rheumatology - To evaluate the three-year efficacy and safety of ixekizumab with and without concomitant conventional synthetic disease-modifying antirheumatic drug (csDMARD) use in...  相似文献   
3.
The International Journal of Cardiovascular Imaging - The new version of EchoPAC platform was recently developed by General Electronics (GE) to provide ‘vendor-independent’...  相似文献   
4.
Minimally invasive approaches are increasingly being applied in surgeries and have recently been used in living donor hepatectomy. We have developed a safe and reproducible method for minimally invasive living donor liver transplantation, which consists of pure laparoscopic explant hepatectomy and pure laparoscopic implantation of the graft, which was inserted through a suprapubic incision. Pure laparoscopic explant hepatectomy without liver fragmentation was performed in a 60-year-old man with alcoholic liver cirrhosis and hepatocellular carcinoma. The explanted liver was retrieved through a suprapubic incision. A modified right liver graft, procured from his 24-year-old son using the pure laparoscopic method, was inserted through a suprapubic incision, and implantation was performed intracorporeally throughout the procedure. The time required to remove the liver was 369 min, and the total operative time was 960 min. No complications occurred during or after the surgery. The patient recovered well, and his hospital stay was of 11 days. Pure laparoscopic living donor liver transplantation from explant hepatectomy to implantation was performed successfully. It is a feasible procedure when performed by a highly experienced surgeon and transplantation team. Further studies with larger sample sizes are needed to confirm its safety and feasibility.

  相似文献   

5.
Journal of Digital Imaging - The purpose of this study was to evaluate the feasibility of translation of RadLex lexicon from English to German performed by Google Translate, using the RadLex...  相似文献   
6.
Breast Cancer Research and Treatment - We evaluated the benefit of chemotherapy in patients with ipsilateral breast tumor recurrence (IBTR) by comparing the survival outcomes between the...  相似文献   
7.
Ahn  Sung Soo  Ha  Jang Woo  Park  Yong-Beom  Lee  Sang-Won 《Clinical rheumatology》2022,41(11):3429-3437
Clinical Rheumatology - Birmingham vasculitis activity score (BVAS) version 3 (BVAS 3.0) and BVAS/granulomatosis with polyangiitis (BVAS/GPA) are used as indicators of disease activity in...  相似文献   
8.

Asian American immigrant (AAI) women may have suboptimal 24-h activity patterns due to traditional gender role and caregiving responsibilities. However, little is known about their objectively-measured activity. We measured AAI women’s 24-h activity patterns using accelerometry and examined cultural correlates of time in sedentary behavior (SB), light intensity physical activity (LIPA), moderate-to-vigorous physical activity (MVPA) and sleep. Seventy-five AAI women completed surveys on acculturation (years of U.S. residency and English proficiency), discrimination, and sleep quality, and 7 days of wrist- and hip-accelerometer monitoring. Linear regression was conducted controlling for age, BMI, and education. We also compared activity patterns across Asian subgroups (East, Southeast, South Asians). On average, AAI women had 33 min of MVPA, 6.1 h of LIPA, 10 h of SB, and 5.3 h of sleep per day. South Asian women had the longest SB and the shortest sleep and MVPA hours. English proficiency was negatively related to MVPA (p?=?0.03) and LIPA (p?<?0.01). Years of U.S. residency was positively related to SB (p?=?0.07). Discrimination was related to shorter (p?=?0.03) and poorer quality sleep (p?=?0.06). Culturally-tailored programs targeting SB and sleep and integrating coping strategies against discrimination could help optimize AAI women’s 24-h activity patterns.

  相似文献   
9.
Journal of Clinical Immunology - Immune responses to coronavirus disease 2019 (COVID-19) mRNA vaccines in primary antibody deficiencies (PADs) are largely unknown. We investigated antibody and CD4+...  相似文献   
10.
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   
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