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   549520篇
  免费   29886篇
  国内免费   542篇
耳鼻咽喉   6910篇
儿科学   17828篇
妇产科学   13103篇
基础医学   95422篇
口腔科学   12721篇
临床医学   50481篇
内科学   99403篇
皮肤病学   12099篇
神经病学   35857篇
特种医学   20559篇
外国民族医学   54篇
外科学   81752篇
综合类   7857篇
现状与发展   2篇
一般理论   121篇
预防医学   40069篇
眼科学   12268篇
药学   42383篇
  1篇
中国医学   1144篇
肿瘤学   29914篇
  2021年   4385篇
  2019年   4368篇
  2018年   6302篇
  2017年   4548篇
  2016年   5308篇
  2015年   5908篇
  2014年   7914篇
  2013年   11419篇
  2012年   16944篇
  2011年   18824篇
  2010年   10702篇
  2009年   9427篇
  2008年   16858篇
  2007年   18505篇
  2006年   17974篇
  2005年   17298篇
  2004年   16777篇
  2003年   16084篇
  2002年   15573篇
  2001年   22830篇
  2000年   23340篇
  1999年   19250篇
  1998年   5404篇
  1997年   4513篇
  1996年   4540篇
  1995年   4226篇
  1992年   14693篇
  1991年   16105篇
  1990年   16237篇
  1989年   15917篇
  1988年   14574篇
  1987年   14462篇
  1986年   13421篇
  1985年   12927篇
  1984年   9565篇
  1983年   8184篇
  1982年   4301篇
  1979年   9145篇
  1978年   6562篇
  1977年   5288篇
  1976年   5662篇
  1975年   6745篇
  1974年   7558篇
  1973年   7302篇
  1972年   6748篇
  1971年   6415篇
  1970年   5986篇
  1969年   5569篇
  1968年   5240篇
  1967年   4694篇
排序方式: 共有10000条查询结果,搜索用时 238 毫秒
1.
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   
2.
3.
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   
4.
5.
6.
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   
7.
Microbial co-infections are another primary concern in patients with coronavirus disease 2019 (COVID-19), yet it is an untouched area among researchers. Preliminary data and systematic reviews only show the type of pathogens responsible for that, but its pathophysiology is still unknown. Studies show that these microbial co-infections are hospital-acquired/nosocomial infections, and patients admitted to intensive care units with invasive mechanical ventilation are highly susceptible to it. Patients with COVID-19 had elevated inflammatory cytokines and a weakened cell-mediated immune response, with lower CD4+ T and CD8+ T cell counts, indicating vulnerability to various co-infections. Despite this, there are only a few studies that recommend the management of co-infections.  相似文献   
8.
Introduction: Percutaneous renal mass biopsy has evolved over the last decade with improvements on previous pitfalls including low tissue yield, high non-diagnostic rates, and complications. As understanding of tumor biology and natural history of renal cortical neoplasms has improved, percutaneous renal mass biopsy is poised to have an expanding role in an area characterized by individualized management and refined risk stratification.

Areas covered: This review summarizes the evolution of renal mass biopsy to its current state with respect to outcomes, indications, and clinical guidelines.

Expert opinion: With improved understanding of differential biological potential of renal cortical neoplasms combined with technical improvements in diagnostic yield and accuracy, utilization of renal mass biopsy is becoming an important adjunct to patient care in a broad range of clinical scenarios, including active surveillance, thermal ablation, and use of primary systemic therapy in localized and advanced settings.  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