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   68753篇
  免费   4504篇
  国内免费   204篇
耳鼻咽喉   870篇
儿科学   2472篇
妇产科学   2033篇
基础医学   10100篇
口腔科学   1072篇
临床医学   8377篇
内科学   13370篇
皮肤病学   1244篇
神经病学   6901篇
特种医学   1866篇
外国民族医学   15篇
外科学   7209篇
综合类   879篇
一般理论   45篇
预防医学   6356篇
眼科学   1383篇
药学   4328篇
中国医学   98篇
肿瘤学   4843篇
  2023年   342篇
  2022年   675篇
  2021年   1211篇
  2020年   712篇
  2019年   1115篇
  2018年   1339篇
  2017年   1064篇
  2016年   1282篇
  2015年   1434篇
  2014年   1938篇
  2013年   2797篇
  2012年   4166篇
  2011年   4398篇
  2010年   2214篇
  2009年   2218篇
  2008年   3977篇
  2007年   4286篇
  2006年   4279篇
  2005年   4250篇
  2004年   3975篇
  2003年   3796篇
  2002年   3505篇
  2001年   1273篇
  2000年   1200篇
  1999年   1156篇
  1998年   823篇
  1997年   683篇
  1996年   596篇
  1995年   562篇
  1994年   447篇
  1993年   474篇
  1992年   684篇
  1991年   712篇
  1990年   673篇
  1989年   584篇
  1988年   573篇
  1987年   553篇
  1986年   522篇
  1985年   537篇
  1984年   459篇
  1983年   396篇
  1982年   374篇
  1981年   319篇
  1980年   308篇
  1979年   369篇
  1978年   289篇
  1977年   266篇
  1976年   238篇
  1975年   235篇
  1974年   270篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
ObjectiveSpinal cord stimulation (SCS) is an effective treatment in failed back surgery syndrome (FBSS). We studied the effect of preimplantation opioid use on SCS outcome and the effect of SCS on opioid use during a two-year follow-up period.Materials and methodsThe study cohort included 211 consecutive FBSS patients who underwent an SCS trial from January 1997 to March 2014. Participants were divided into groups, which were as follows: 1) SCS trial only (n = 47), 2) successful SCS (implanted and in use throughout the two-year follow-up period, n = 131), and 3) unsuccessful SCS (implanted but later explanted or revised due to inadequate pain relief, n = 29). Patients who underwent explantation for other reasons (n = 4) were excluded. Opioid purchase data from January 1995 to March 2016 were retrieved from national registries.ResultsHigher preimplantation opioid doses associated with unsuccessful SCS (ROC: AUC = 0.66, p = 0.009), with 35 morphine milligram equivalents (MME)/day as the optimal cutoff value. All opioids were discontinued in 23% of patients with successful SCS, but in none of the patients with unsuccessful SCS (p = 0.004). Strong opioids were discontinued in 39% of patients with successful SCS, but in none of the patients with unsuccessful SCS (p = 0.04). Mean opioid dose escalated from 18 ± 4 MME/day to 36 ± 6 MME/day with successful SCS and from 22 ± 8 MME/day to 82 ± 21 MME/day with unsuccessful SCS (p < 0.001).ConclusionsHigher preimplantation opioid doses were associated with SCS failure, suggesting the need for opioid tapering before implantation. With continuous SCS therapy and no explantation or revision due to inadequate pain relief, 39% of FBSS patients discontinued strong opioids, and 23% discontinued all opioids. This indicates that SCS should be considered before detrimental dose escalation.  相似文献   
2.
Abstract

Purpose

Financial hardship can be a major cause of distress among persons with cancer, resulting in chronic stress and impacting physical and emotional health. This paper provides an analysis of the lived experience of cancer patients’ financial hardship from diagnosis to post-treatment.  相似文献   
3.
Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz - Akteure der öffentlichen Gesundheit (Public Health) tragen wesentlich zu Gesundheitsschutz, -förderung und...  相似文献   
4.
5.
6.
7.
8.
Few studies have examined the effects of parental incarceration (PI) on outcomes above and beyond other risk and adverse childhood experiences (ACEs). The objectives of this study were to (1) the associations between PI and mental health problems (attention, externalizing, internalizing, and total behavioral problems) and (2) the mediating role of current socioeconomic status and cumulative ACEs. An observational and cross-sectional design was employed. Analyses included hierarchical multivariable linear regression modeling. The analytic sample included 613 adolescents (11–17?years). On average, youth exposed to PI experienced three times as many ACEs compared with youth unexposed. Youth exposed to PI were more likely to have behavioral problems than their unexposed peers. The main effect for all models was attenuated by current economic hardship as well as exposure to increasing numbers of ACEs. Exposure to PI can be viewed as a marker of accumulative risk for intervention since youth impacted by PI are more likely to experience behavioral difficulties and associated adverse childhood experiences. Due to the associated adversity that impact youth exposed to PI, mental health providers need to be able to identify and screen for symptoms associated with trauma.  相似文献   
9.
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