全文获取类型
收费全文 | 51941篇 |
免费 | 3689篇 |
国内免费 | 310篇 |
专业分类
耳鼻咽喉 | 531篇 |
儿科学 | 1331篇 |
妇产科学 | 1018篇 |
基础医学 | 6949篇 |
口腔科学 | 835篇 |
临床医学 | 4762篇 |
内科学 | 11426篇 |
皮肤病学 | 1075篇 |
神经病学 | 5049篇 |
特种医学 | 1970篇 |
外国民族医学 | 1篇 |
外科学 | 7172篇 |
综合类 | 625篇 |
现状与发展 | 1篇 |
一般理论 | 41篇 |
预防医学 | 3835篇 |
眼科学 | 1237篇 |
药学 | 3917篇 |
1篇 | |
中国医学 | 215篇 |
肿瘤学 | 3949篇 |
出版年
2023年 | 315篇 |
2022年 | 587篇 |
2021年 | 1110篇 |
2020年 | 704篇 |
2019年 | 1071篇 |
2018年 | 1228篇 |
2017年 | 947篇 |
2016年 | 1139篇 |
2015年 | 1441篇 |
2014年 | 1939篇 |
2013年 | 2454篇 |
2012年 | 3686篇 |
2011年 | 3986篇 |
2010年 | 2301篇 |
2009年 | 2044篇 |
2008年 | 3126篇 |
2007年 | 3422篇 |
2006年 | 3211篇 |
2005年 | 3279篇 |
2004年 | 2926篇 |
2003年 | 2684篇 |
2002年 | 2527篇 |
2001年 | 588篇 |
2000年 | 519篇 |
1999年 | 619篇 |
1998年 | 562篇 |
1997年 | 429篇 |
1996年 | 424篇 |
1995年 | 351篇 |
1994年 | 297篇 |
1993年 | 322篇 |
1992年 | 367篇 |
1991年 | 359篇 |
1990年 | 292篇 |
1989年 | 303篇 |
1988年 | 278篇 |
1987年 | 256篇 |
1986年 | 210篇 |
1985年 | 257篇 |
1984年 | 311篇 |
1983年 | 249篇 |
1982年 | 271篇 |
1981年 | 281篇 |
1980年 | 271篇 |
1979年 | 148篇 |
1978年 | 154篇 |
1977年 | 151篇 |
1976年 | 123篇 |
1974年 | 120篇 |
1973年 | 100篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Janitz Amanda E. Schraw Jeremy M. Xu Chao Lupo Philip J. 《Cancer causes & control : CCC》2022,33(3):483-488
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.
Philip S. Vendittelli Bassent Botros Howard S. Rosman Viren Govindaraju Anwar Zaitoun Tariq S. Marroush 《The American journal of the medical sciences》2019,357(4):333-337
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.
Hyun Jong Choi Jong Ho Moon Yun Nah Lee Hyun Su Kim Ji Su Ha Tae Hoon Lee Sang‐Woo Cha Young Deok Cho Sang‐Heum Park 《Digestive endoscopy》2015,27(7):772-775
Direct peroral cholangioscopy (POC) using an ultra‐slim upper endoscope is one modality of POC for intraductal endoscopic evaluation and treatment of the bile duct. Choledochoduodenostomy (CDS) is one modality of biliary bypass surgery that provides a new route to the bile duct. We carried out direct POC using an ultra‐slim upper endoscope without the use of accessories in 10 patients (four sump syndromes, three bile duct strictures and three intrahepatic duct stones) previously undergoing surgical CDS. Direct POC was successful in all patients. The use of an intraductal balloon catheter was required in one patient for advancement of the endoscope into the bile duct. Distal bile ducts with sump syndromes were cleared using baskets and water irrigation under direct POC. Cholangiocarcinoma was diagnosed in one patient with hilar bile duct stricture after cholangioscopic evaluation and a targeting forceps biopsy under direct POC. Intrahepatic duct stones were successfully extracted after intraductal fragmentation under direct POC. Oozing bleeding occurred during intraductal lithotripsy but stopped spontaneously. Direct POC using an ultra‐slim upper endoscope without the assistance of accessories can easily be carried out in patients undergoing CDS. 相似文献
6.
7.
8.
Michael L. Goodman Miriam S. Mutambudzi Stanley Gitari Philip H. Keiser Sarah E. Seidel 《Vulnerable children and youth studies》2016,11(4):366-378
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
9.
10.
Eloise R. Galligan Lindsey Fix Sameera Husain Philip Zachariah Darrell J. Yamashiro Christine T. Lauren 《Journal of cutaneous pathology》2019,46(2):159-161
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