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   584499篇
  免费   31437篇
  国内免费   531篇
耳鼻咽喉   7548篇
儿科学   18592篇
妇产科学   13831篇
基础医学   100784篇
口腔科学   14422篇
临床医学   53602篇
内科学   105220篇
皮肤病学   13301篇
神经病学   39960篇
特种医学   22368篇
外国民族医学   53篇
外科学   85776篇
综合类   7792篇
现状与发展   2篇
一般理论   136篇
预防医学   42094篇
眼科学   13067篇
药学   45210篇
  1篇
中国医学   1210篇
肿瘤学   31498篇
  2021年   4376篇
  2019年   4483篇
  2018年   6965篇
  2017年   5180篇
  2016年   6231篇
  2015年   6452篇
  2014年   8407篇
  2013年   12825篇
  2012年   18526篇
  2011年   20748篇
  2010年   11719篇
  2009年   9957篇
  2008年   19000篇
  2007年   20920篇
  2006年   20210篇
  2005年   19441篇
  2004年   18975篇
  2003年   18353篇
  2002年   17794篇
  2001年   24720篇
  2000年   25900篇
  1999年   20515篇
  1998年   5764篇
  1997年   4818篇
  1996年   4741篇
  1995年   4406篇
  1992年   14677篇
  1991年   16031篇
  1990年   16148篇
  1989年   15902篇
  1988年   14517篇
  1987年   14400篇
  1986年   13381篇
  1985年   12951篇
  1984年   9676篇
  1983年   8245篇
  1982年   4419篇
  1979年   9154篇
  1978年   6558篇
  1977年   5332篇
  1976年   5687篇
  1975年   6773篇
  1974年   7564篇
  1973年   7333篇
  1972年   6697篇
  1971年   6403篇
  1970年   5975篇
  1969年   5572篇
  1968年   5269篇
  1967年   4708篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
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   
2.
Die Anaesthesiologie - Phantomschmerzen haben eine hohe Prävalenz nach Majoramputationen und sind mit einer zusätzlichen Einschränkung der Lebensqualität verbunden....  相似文献   
3.
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   
4.
5.
6.
Journal of Behavioral Medicine - Evidence supports the use of graphic warnings to educate the public about the health harms of smoking and suggests warnings eliciting negative emotional responses...  相似文献   
7.
The adrenal cortex gives rise to a biologically heterogenous group of neoplasms, each with a distinct morphology, antigen expression and molecular profile. Adrenal cortical adenomas have excellent prognosis and are usually cured by surgical resection alone, while adrenal cortical carcinomas are very aggressive tumors with a poor prognosis regardless of therapy. These tumors are rare and often challenging for a pathologist to diagnose, as significant overlap exists between benign and malignant lesions in some cases. In this review, we attempt to summarize most important histologic and clinical features of adrenal cortical adenomas and carcinomas, clarify the use of different grading systems, the use of special stains and the differential diagnosis for practicing pathologists. Most relevant hereditary syndromes associated with adrenal cortical tumors are listed. Updates in molecular alterations in adrenal cortical neoplasms and hyperplastic diseases as well as their clinical significance and potential therapeutic implications are also discussed.  相似文献   
8.
9.
10.
Journal of Immigrant and Minority Health - COVID-19 has disproportionally affected underrepresented minorities (URM) and low-income immigrants in the United States. The aim of the study is to...  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