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   112464篇
  免费   9344篇
  国内免费   407篇
耳鼻咽喉   1335篇
儿科学   2692篇
妇产科学   1722篇
基础医学   15125篇
口腔科学   8886篇
临床医学   10913篇
内科学   22589篇
皮肤病学   1968篇
神经病学   11401篇
特种医学   4282篇
外国民族医学   6篇
外科学   15497篇
综合类   1275篇
一般理论   74篇
预防医学   8260篇
眼科学   1761篇
药学   7283篇
中国医学   112篇
肿瘤学   7034篇
  2023年   873篇
  2022年   938篇
  2021年   2217篇
  2020年   1462篇
  2019年   2035篇
  2018年   2701篇
  2017年   2148篇
  2016年   2542篇
  2015年   2951篇
  2014年   3772篇
  2013年   4857篇
  2012年   7066篇
  2011年   7109篇
  2010年   4379篇
  2009年   4220篇
  2008年   6344篇
  2007年   6782篇
  2006年   6340篇
  2005年   6232篇
  2004年   5831篇
  2003年   5272篇
  2002年   5180篇
  2001年   2202篇
  2000年   2074篇
  1999年   1950篇
  1998年   1494篇
  1997年   1237篇
  1996年   1041篇
  1995年   1025篇
  1994年   897篇
  1993年   797篇
  1992年   1419篇
  1991年   1264篇
  1990年   1196篇
  1989年   1132篇
  1988年   1014篇
  1987年   969篇
  1986年   949篇
  1985年   981篇
  1984年   792篇
  1983年   688篇
  1982年   644篇
  1981年   511篇
  1980年   427篇
  1979年   553篇
  1978年   453篇
  1977年   405篇
  1975年   366篇
  1974年   398篇
  1973年   371篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
3.
International Journal of Clinical Oncology - Immune-checkpoint inhibitors (ICIs) are standard treatments for metastatic non-small cell lung cancer (NSCLC). Patients with poor performance status...  相似文献   
4.
5.
The current study explored the influence of three methods of parental emotion discourse (structured story-telling, reminiscing, and picture book) and their relation to preschoolers’ emotion understanding. Thirty-seven families participated in the study. Analyses showed that the structured story-telling method produced more emotion words, was high in unique emotion words, and was high for both emotion labelling and explanations. All three methods showed some potential to predict preschooler’s emotion understanding. Structured story-telling was best at predicting role-taking, while reminiscing and the picture book both were better at predicting situation knowledge. Additional studies are needed to further explore the influence of different methods of assessing emotion discourse to enhance validity and reliability of research in this field.  相似文献   
6.
7.
8.
9.
Nidogen 1 (NID1) is a glycoprotein found in basement membranes involved in cross-linking collagen IV and laminin. The role of NID in breast cancer has only been evaluated in a small number of studies and the findings of these studies have been inconsistent. Our previous work revealed that highly tumorigenic murine mammary tumor cells express high levels of Nid1 while weakly tumorigenic mammary tumor cells express low levels of Nid1. To investigate Nid1, two stable knockdown lines were created, and Nid1 knockdown was confirmed at both the mRNA and protein level. Nid1 knockdown significantly reduced cell proliferation and migration/invasion and these reductions in proliferation and migration/invasion could be rescued by conditioned media containing NID1 protein. The reduced migration/invasion observed in the Nid1 knockdown cells was not associated with significant alterations in the epithelial gene Cdh1 or the mesenchymal genes Snai1, Snai2, Twist1, Twist2, Zeb1 and Zeb2. Therefore, suppression of Nid1 expression reduces proliferation and migration/invasion in claudin-low murine mammary tumor cells.  相似文献   
10.
The Yakima Valley Farm Workers Clinic (YVFWC) is one of the largest community health centers in the country with clinics throughout south-central Washington and northern Oregon. Its dental program consists of 14 dental clinics providing general and specialty services to the low-income populations it serves. Modeling itself after the YVFWC medical managed care program; the Dental program recently added value-based metrics to its dental practice after Oregon offered a value-based dental reimbursement plan in 2019. This is the first-step YVFWC's dental program that has taken to prepare for value-based reimbursement and transform its dental practice in order to reduce the disease burden in its patient population. The purpose of this article is to describe the processes YVFWC undertook to prepare itself for the new reimbursement model, which included the development of metrics, a metric validation process, a clinical dashboard, and a method for improving metrics. It also outlines its medical/dental integration improvement brought about by embedding hygienists into the medical primary care teams.  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