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   37702篇
  免费   2774篇
  国内免费   205篇
耳鼻咽喉   297篇
儿科学   1112篇
妇产科学   732篇
基础医学   4665篇
口腔科学   650篇
临床医学   3700篇
内科学   8338篇
皮肤病学   584篇
神经病学   3848篇
特种医学   1165篇
外国民族医学   1篇
外科学   5286篇
综合类   825篇
一般理论   30篇
预防医学   3096篇
眼科学   750篇
药学   2711篇
  4篇
中国医学   186篇
肿瘤学   2701篇
  2023年   221篇
  2022年   285篇
  2021年   756篇
  2020年   525篇
  2019年   718篇
  2018年   831篇
  2017年   651篇
  2016年   699篇
  2015年   849篇
  2014年   1199篇
  2013年   1691篇
  2012年   2508篇
  2011年   2786篇
  2010年   1574篇
  2009年   1469篇
  2008年   2368篇
  2007年   2652篇
  2006年   2495篇
  2005年   2597篇
  2004年   2333篇
  2003年   2205篇
  2002年   2029篇
  2001年   349篇
  2000年   273篇
  1999年   395篇
  1998年   457篇
  1997年   342篇
  1996年   337篇
  1995年   279篇
  1994年   244篇
  1993年   272篇
  1992年   229篇
  1991年   219篇
  1990年   182篇
  1989年   162篇
  1988年   172篇
  1987年   151篇
  1986年   118篇
  1985年   178篇
  1984年   246篇
  1983年   206篇
  1982年   242篇
  1981年   250篇
  1980年   242篇
  1979年   116篇
  1978年   131篇
  1977年   127篇
  1976年   114篇
  1974年   92篇
  1973年   76篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
Cancer Causes & Control - Congenital malformations are strong risk factors for childhood cancer. Our objective was to determine whether cancer survival differs by birth defect status among...  相似文献   
2.
3.
4.
Coronary embolism (CE) is an uncommon and unique cause of acute myocardial infarction. In this report, we review 216 cases of CE including 2 new cases from our institution. The mean patient age was 52.5 years and 62% of the patients were males. Chest pain was the most common presenting symptom followed by dyspnea, and the most commonly affected vessel was the left anterior descending artery. Leading etiologies of the embolus were atrial fibrillation, septic emboli, and iatrogenic causes. Treatment approaches varied with thrombus aspiration being used in 30% of cases. In-hospital mortality rate was 36% and 13% of the cases were complicated by cerebrovascular accident. CE is a unique pathology that leads to acute myocardial infarction. It portends a high mortality rate and requires a high level of suspicion as symptoms may be misleading. Further research is needed in order to improve recognition and management and to lower associated mortality.  相似文献   
5.
6.
7.
There are an estimated 56 million orphans and vulnerable children across sub-Saharan Africa. Communities typically care for orphan children through informal caring arrangements – either within or outside of kinship networks. Within Kenya, an estimated 250,000 children live on the streets. There is less research related to fostering attitudes of this special population than orphans and vulnerable children generally. Important research over the past decade has illuminated multiple ways in which children are made more vulnerable because of HIV, including parental death and street-migration from HIV-affected households. As HIV transitions from a terminal illness to a chronic, manageable one, research is also required to establish how parents living with HIV can be an asset to children. In this study, we assess whether mothers living with HIV were very willing to foster biologically-related children, and street-involved children, how these fostering attitudes differed from mothers not living with HIV, and whether differences in fostering attitudes by reported HIV status were mediated by social support, family functioning and general self-rated health. Approximately 40% of mothers living with HIV were very willing to provide long-term foster care to biologically-related or street-involved children. This was less than the percentage of mothers not living with HIV, who were very willing to foster biologically-related children (61%) or street-involved children (58%). Significant portions of these differences were explained by social support, family functioning and general self-rated health. Multi-sectoral approaches are suggested by these findings in order to improve the child-fostering capacity of mothers living with HIV. Improving social support, family functioning and general self-rated health among HIV-infected mothers may not only provide protective benefits for the mothers and their children, but also expand the community’s capacity to care for orphan and vulnerable children.  相似文献   
8.
9.
10.
We report a case of disseminated Trichosporon asahii in a patient on systemic antifungal therapy who presented with multiple cutaneous nodules suggestive of fungal infection. Histologic features resembled neutrophilic eccrine hidradenitis but staining with periodic acid‐Schiff and Gomori methenamine silver confirmed the clinical diagnosis. This case highlights the importance of maintaining suspicion for trichosporonosis and contextualizing histologic findings within the underlying clinical picture.  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