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   2397183篇
  免费   209240篇
  国内免费   3312篇
耳鼻咽喉   33331篇
儿科学   79343篇
妇产科学   63241篇
基础医学   359035篇
口腔科学   67728篇
临床医学   220284篇
内科学   471980篇
皮肤病学   57245篇
神经病学   194920篇
特种医学   89668篇
外国民族医学   489篇
外科学   364366篇
综合类   47338篇
现状与发展   12篇
一般理论   867篇
预防医学   185260篇
眼科学   55294篇
药学   179495篇
  9篇
中国医学   5449篇
肿瘤学   134381篇
  2021年   19471篇
  2019年   28512篇
  2018年   34781篇
  2017年   29108篇
  2016年   31998篇
  2015年   34952篇
  2014年   45310篇
  2013年   63734篇
  2012年   78024篇
  2011年   82637篇
  2010年   54100篇
  2009年   48850篇
  2008年   76378篇
  2007年   80336篇
  2006年   81165篇
  2005年   78469篇
  2004年   75066篇
  2003年   72321篇
  2002年   70081篇
  2001年   109470篇
  2000年   112088篇
  1999年   93800篇
  1998年   27058篇
  1997年   23602篇
  1996年   22399篇
  1995年   22607篇
  1994年   20806篇
  1993年   19620篇
  1992年   71972篇
  1991年   70118篇
  1990年   68425篇
  1989年   65696篇
  1988年   60315篇
  1987年   59135篇
  1986年   55239篇
  1985年   53014篇
  1984年   39274篇
  1983年   33337篇
  1982年   19789篇
  1979年   35805篇
  1978年   25593篇
  1977年   21142篇
  1976年   20273篇
  1975年   21765篇
  1974年   26111篇
  1973年   24782篇
  1972年   23194篇
  1971年   22037篇
  1970年   20235篇
  1969年   19304篇
排序方式: 共有10000条查询结果,搜索用时 765 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.
10.
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   
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