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   42173篇
  免费   2971篇
  国内免费   174篇
耳鼻咽喉   329篇
儿科学   1385篇
妇产科学   796篇
基础医学   5189篇
口腔科学   752篇
临床医学   4086篇
内科学   9466篇
皮肤病学   643篇
神经病学   4323篇
特种医学   1267篇
外国民族医学   1篇
外科学   6190篇
综合类   660篇
一般理论   33篇
预防医学   3308篇
眼科学   880篇
药学   2897篇
  1篇
中国医学   69篇
肿瘤学   3043篇
  2023年   292篇
  2022年   419篇
  2021年   886篇
  2020年   594篇
  2019年   853篇
  2018年   984篇
  2017年   741篇
  2016年   824篇
  2015年   954篇
  2014年   1375篇
  2013年   1846篇
  2012年   2805篇
  2011年   3132篇
  2010年   1716篇
  2009年   1590篇
  2008年   2589篇
  2007年   2871篇
  2006年   2723篇
  2005年   2784篇
  2004年   2531篇
  2003年   2416篇
  2002年   2220篇
  2001年   444篇
  2000年   358篇
  1999年   483篇
  1998年   495篇
  1997年   370篇
  1996年   363篇
  1995年   294篇
  1994年   269篇
  1993年   293篇
  1992年   267篇
  1991年   255篇
  1990年   214篇
  1989年   190篇
  1988年   205篇
  1987年   171篇
  1986年   139篇
  1985年   212篇
  1984年   273篇
  1983年   228篇
  1982年   262篇
  1981年   263篇
  1980年   253篇
  1979年   135篇
  1978年   147篇
  1977年   142篇
  1976年   125篇
  1974年   108篇
  1973年   82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.
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   
4.
5.
6.
ABSTRACT

Informal settlements remain a public health problem as they lack basic infrastructure. Furthermore, it is challenging to enforce public health regulations and protocols to prevent the spread of infection during a pandemic. This paper was set out to explore the impact of lockdown during COVID-19 among people living in informal settlements. An exploratory qualitative design was utilised. Purposive sampling was used to select research participants. In-depth one-to-one interviews were held involving 30 research participants through a WhatsApp online telephone platform. A thematic approach underpinned by the four stages of data analysis in interpretive phenomenological analysis was utilised to analyse the data. The study found that during the the research participants were affected by lack of space to practice social distancing, over-burdened infrastructure, lack of savings, loss of income and shortage of food, hunger and diseases, anxiety and depression and poor access to education. There is a need to prioritise the needs of informal settlers and endeavour to establish permanent homes. Health promotion and communication initiatives and pandemic awareness programmes are needed to mitigate the impact of lockdown during a pandemic in informal settlements.  相似文献   
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.
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   
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