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   2362872篇
  免费   176029篇
  国内免费   3362篇
耳鼻咽喉   32368篇
儿科学   76688篇
妇产科学   63324篇
基础医学   351169篇
口腔科学   64019篇
临床医学   212603篇
内科学   459750篇
皮肤病学   52133篇
神经病学   187207篇
特种医学   88782篇
外国民族医学   503篇
外科学   356438篇
综合类   47524篇
现状与发展   12篇
一般理论   850篇
预防医学   183365篇
眼科学   54654篇
药学   176032篇
  9篇
中国医学   4587篇
肿瘤学   130246篇
  2021年   19257篇
  2019年   19786篇
  2018年   27360篇
  2017年   20620篇
  2016年   23118篇
  2015年   25991篇
  2014年   36572篇
  2013年   54606篇
  2012年   75557篇
  2011年   80376篇
  2010年   47560篇
  2009年   45082篇
  2008年   75524篇
  2007年   80432篇
  2006年   81206篇
  2005年   78682篇
  2004年   75117篇
  2003年   72473篇
  2002年   70091篇
  2001年   109274篇
  2000年   111998篇
  1999年   93983篇
  1998年   27241篇
  1997年   23850篇
  1996年   24208篇
  1995年   22854篇
  1994年   21023篇
  1993年   19834篇
  1992年   72295篇
  1991年   70424篇
  1990年   68719篇
  1989年   65932篇
  1988年   60564篇
  1987年   59390篇
  1986年   55479篇
  1985年   53252篇
  1984年   39493篇
  1983年   33545篇
  1982年   19950篇
  1979年   36067篇
  1978年   25789篇
  1977年   21344篇
  1976年   20451篇
  1975年   21948篇
  1974年   26316篇
  1973年   24945篇
  1972年   23328篇
  1971年   22145篇
  1970年   20330篇
  1969年   19370篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Quality of Life Research - The COVID-19 pandemic might add to the stressors experienced by people living with rheumatic diseases. This study aimed to examine rheumatic patients’ functional...  相似文献   
2.
Molnár  B.  Aroca  S.  Dobos  A.  Orbán  K.  Szabó  J.  Windisch  P.  Stähli  A.  Sculean  A. 《Clinical oral investigations》2022,26(12):7135-7142
Clinical Oral Investigations - To evaluate t he long-term outcomes following treatment of RT 1 multiple adjacent gingival recessions (MAGR) using the modified coronally advanced tunnel (MCAT) with...  相似文献   
3.
4.
5.
Journal of Medical Ultrasonics - Chronic liver disease is still a major problem because disease progression will ultimately lead to liver cirrhosis. Portal hypertension is the hallmark in advanced...  相似文献   
6.
7.
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   
8.
9.
The coronavirus disease 2019 (COVID-19) pandemic has rapidly created widespread impacts on global health and the economy. Data suggest that women are less susceptible to severe illness. However, sex-disaggregated data are incomplete, leaving room for misinterpretation, and focusing only on biologic sex underestimates the gendered impact of the pandemic on women. This narrative review summarizes what is known about gender disparities during the COVID-19 pandemic and the economic, domestic, and health burdens along with overlapping vulnerabilities related to the pandemic. In addition, this review outlines recommended strategies that advocacy groups, community leaders, and policymakers should implement to mitigate the widening gender disparities related to COVID-19.  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