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   245281篇
  免费   4333篇
  国内免费   302篇
耳鼻咽喉   2417篇
儿科学   8174篇
妇产科学   6123篇
基础医学   26318篇
口腔科学   3983篇
临床医学   18354篇
内科学   44695篇
皮肤病学   2203篇
神经病学   23198篇
特种医学   10798篇
外国民族医学   1篇
外科学   37004篇
综合类   2746篇
一般理论   45篇
预防医学   22921篇
眼科学   4530篇
药学   15402篇
  1篇
中国医学   717篇
肿瘤学   20286篇
  2022年   686篇
  2021年   1269篇
  2020年   833篇
  2019年   1181篇
  2018年   23272篇
  2017年   18494篇
  2016年   20798篇
  2015年   2486篇
  2014年   2996篇
  2013年   3865篇
  2012年   11439篇
  2011年   25558篇
  2010年   21418篇
  2009年   13676篇
  2008年   23016篇
  2007年   25660篇
  2006年   4506篇
  2005年   6121篇
  2004年   7152篇
  2003年   7876篇
  2002年   5672篇
  2001年   1370篇
  2000年   1432篇
  1999年   1197篇
  1998年   913篇
  1997年   687篇
  1996年   521篇
  1995年   484篇
  1994年   417篇
  1992年   641篇
  1991年   628篇
  1990年   679篇
  1989年   697篇
  1988年   704篇
  1987年   655篇
  1986年   649篇
  1985年   667篇
  1984年   541篇
  1983年   441篇
  1979年   634篇
  1978年   440篇
  1977年   385篇
  1975年   448篇
  1974年   605篇
  1973年   567篇
  1972年   469篇
  1971年   441篇
  1970年   436篇
  1969年   450篇
  1968年   395篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
Dupuytren’s disease with severe finger contractures and recurrent contractures following previous surgery often have extensive skin involvement. In these severe cases, excision of the diseased chord along with the involved skin is a good option to reduce the risk of recurrance. The resulting skin defect can be covered with a full thickness skin graft (FTSG) or a cross finger flap. Cross finger flaps have donor finger morbidity and hence a full thickness graft is usually preferred. The FTSG extending to the midlateral margins on both sides of the finger reduces the risk of joint contracture due to graft shrinkage. Once the FTSG is sutured in place, the standard practice is to compress and secure the graft to its recipient bed with a tie-over dressing and this can be time consuming. We present a simple dressing technique to secure the FTSG without the need for a tie-over dressing.  相似文献   
3.
4.
5.
Objectives: The steeling effect suggests that early-life adversity can have a beneficial impact later in life. However, little is known about its underlying mechanisms and long-term outcomes . The study aimed to examine the role of early-life adversity (ELA) on successful aging, and whether this relationship can be explained by mental and physical health.

Method: Socio-demographics, early-life adversity (ELA), individual quality of life (iQoL), and mental and physical health of 270 individuals (Mage = 66.82 years, 71.5% female) were assessed. Polynomial regressions and mediation analyses were conducted.

Results: Significant inverse U-shaped associations were found between ELA and iQoL (β = ?.59, p = .005) and between ELA and mental health (β = ?.64, p = .002), but not between ELA and physical health. Furthermore, mental health significantly mediated the relationship between ELA and iQoL (b = ?.84, BCa CI [?1.66, ?.27]).

Conclusion: Highest level of individual quality of life (i.e. successful aging) was related to a moderate amount of ELA. Additionally, mental health significantly mediated this relationship. These findings suggest that some amount of ELA could be beneficial for successful aging. Resource-focused interventions are needed to improve health and promote successful aging for an underdetected, at-risk subgroup with low early-life adversity.  相似文献   

6.
7.
8.
9.
Gastroesophageal reflux is the most common benign disorder of the esophagus and laparoscopic Nissen fundoplication has become the standard surgical treatment for its treatment. In our area, where the use of bougie calibration is debatable, postoperative dysphagia is encountered often after this surgery although it is usually not permanent. The aim of this study was to investigate the effect of using a soft silicone tube 39 F in diameter for esophageal calibration during laparoscopic Nissen fundoplication on the incidence of postoperative dysphagia. We divided cases scheduled to undergo laparoscopic Nissen fundoplication between January 2009 and November 2010 into two groups, each consisting 25 patients. Esophageal calibration with a 39 F silicone orogastric tube was used for the first group while there was no operative calibration in the second group. The surgical duration was recorded; the presence and severity of the postoperative dysphagia was calculated by using a dysphagia severity scoring system during the 1-year postoperative follow-up. The dysphagia severity scores were significantly lower in group 1 than group 2 on the postoperative second day and at the end of the first week and first month. We did not find a significant difference at the end of the 6-month and first year. There was also no significant difference regarding surgery duration. The use of a soft orogastric tube 39 F in diameter for esophagus calibration during laparoscopic Nissen fundoplication has significantly decreased the incidence of postoperative transient dysphagia without affecting the duration of surgery. Although dysphagia gradually resolves in the majority of patients, a safe and easy calibration method for its prevention is worth developing, and we believe that the use of our method in larger series could be beneficial.  相似文献   
10.
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