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   3090289篇
  免费   221697篇
  国内免费   4709篇
耳鼻咽喉   43778篇
儿科学   96667篇
妇产科学   82348篇
基础医学   450448篇
口腔科学   88136篇
临床医学   275890篇
内科学   595012篇
皮肤病学   68191篇
神经病学   245215篇
特种医学   118747篇
外国民族医学   581篇
外科学   474993篇
综合类   61692篇
现状与发展   12篇
一般理论   1064篇
预防医学   230895篇
眼科学   73112篇
药学   233086篇
  12篇
中国医学   6315篇
肿瘤学   170501篇
  2019年   23977篇
  2018年   34451篇
  2017年   26233篇
  2016年   29945篇
  2015年   33615篇
  2014年   46281篇
  2013年   69068篇
  2012年   95762篇
  2011年   100800篇
  2010年   59876篇
  2009年   56267篇
  2008年   95728篇
  2007年   102163篇
  2006年   103398篇
  2005年   100691篇
  2004年   96421篇
  2003年   93106篇
  2002年   90576篇
  2001年   145850篇
  2000年   149888篇
  1999年   126187篇
  1998年   35177篇
  1997年   30725篇
  1996年   30797篇
  1995年   29003篇
  1994年   26751篇
  1993年   25027篇
  1992年   96929篇
  1991年   94074篇
  1990年   91966篇
  1989年   88689篇
  1988年   81334篇
  1987年   79769篇
  1986年   74514篇
  1985年   71754篇
  1984年   52790篇
  1983年   44937篇
  1982年   25827篇
  1979年   48279篇
  1978年   33976篇
  1977年   28515篇
  1976年   26629篇
  1975年   29059篇
  1974年   34937篇
  1973年   33116篇
  1972年   31186篇
  1971年   29611篇
  1970年   27553篇
  1969年   26212篇
  1968年   23936篇
排序方式: 共有10000条查询结果,搜索用时 14 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.
Intratumor heterogeneity is a main cause of the dismal prognosis of glioblastoma (GBM). Yet, there remains a lack of a uniform assessment of the degree of heterogeneity. With a multiscale approach, we addressed the hypothesis that intratumor heterogeneity exists on different levels comprising traditional regional analyses, but also innovative methods including computer-assisted analysis of tumor morphology combined with epigenomic data. With this aim, 157 biopsies of 37 patients with therapy-naive IDH-wildtype GBM were analyzed regarding the intratumor variance of protein expression of glial marker GFAP, microglia marker Iba1 and proliferation marker Mib1. Hematoxylin and eosin stained slides were evaluated for tumor vascularization. For the estimation of pixel intensity and nuclear profiling, automated analysis was used. Additionally, DNA methylation profiling was conducted separately for the single biopsies. Scoring systems were established to integrate several parameters into one score for the four examined modalities of heterogeneity (regional, cellular, pixel-level and epigenomic). As a result, we could show that heterogeneity was detected in all four modalities. Furthermore, for the regional, cellular and epigenomic level, we confirmed the results of earlier studies stating that a higher degree of heterogeneity is associated with poorer overall survival. To integrate all modalities into one score, we designed a predictor of longer survival, which showed a highly significant separation regarding the OS. In conclusion, multiscale intratumor heterogeneity exists in glioblastoma and its degree has an impact on overall survival. In future studies, the implementation of a broadly feasible heterogeneity index should be considered.  相似文献   
6.
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   
7.
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