全文获取类型
收费全文 | 61124篇 |
免费 | 5344篇 |
国内免费 | 775篇 |
学科分类
医药卫生 | 67243篇 |
出版年
2023年 | 362篇 |
2022年 | 491篇 |
2021年 | 1841篇 |
2020年 | 1130篇 |
2019年 | 1519篇 |
2018年 | 1672篇 |
2017年 | 1358篇 |
2016年 | 1878篇 |
2015年 | 2443篇 |
2014年 | 2890篇 |
2013年 | 3359篇 |
2012年 | 4810篇 |
2011年 | 4577篇 |
2010年 | 2934篇 |
2009年 | 2389篇 |
2008年 | 3317篇 |
2007年 | 3365篇 |
2006年 | 3006篇 |
2005年 | 2762篇 |
2004年 | 2354篇 |
2003年 | 2094篇 |
2002年 | 1916篇 |
2001年 | 1214篇 |
2000年 | 1169篇 |
1999年 | 985篇 |
1998年 | 464篇 |
1997年 | 424篇 |
1996年 | 358篇 |
1995年 | 333篇 |
1994年 | 287篇 |
1993年 | 299篇 |
1992年 | 670篇 |
1991年 | 666篇 |
1990年 | 585篇 |
1989年 | 626篇 |
1988年 | 609篇 |
1987年 | 592篇 |
1986年 | 518篇 |
1985年 | 520篇 |
1984年 | 406篇 |
1983年 | 332篇 |
1982年 | 256篇 |
1981年 | 228篇 |
1980年 | 205篇 |
1979年 | 304篇 |
1978年 | 262篇 |
1977年 | 190篇 |
1974年 | 215篇 |
1973年 | 225篇 |
1972年 | 183篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
Yeon Seok Lee June Hyunkyung Lee Jae Eun Choi Joo Young Kim Tae Young Han 《Pediatric dermatology》2021,38(1):290-291
Erythema induratum of Bazin (EIB) is a form of tuberculid resulting from hypersensitivity to tuberculosis antigen. EIB occurs most commonly in middle‐aged women and is not typically seen in children. Here, we present a rare case of EIB, presenting as a chronic nodular panniculitis, in a 10‐year‐old Korean boy. 相似文献
13.
14.
No national epidemiological investigations have been conducted recently regarding facial lacerations. The study was performed using the data of 3,634,229 people during the 5-year period from 2014 to 2018 archived by the National Health Information Database (NHID) of the Health Insurance Review and Assessment Service. Preschool and children under 10 years old accounted for about one-third of patients. Facial lacerations were concentrated in the “T-shaped” area, which comprised forehead, nose, lips, and the perioral area. The male to female ratio for all study subjects was 2.16:1. Age and gender are significantly related with each other (P < .001). Mean hospital stays decreased, and numbers of outpatient department visits per patient were highest for hospitals and lowest for health agencies. Over the study period, hospital costs per patient in tertiary and general hospitals increased gradually. Preschool and school-aged children are vulnerable to trauma. Male patients outnumbered female patients by a factor of more than 2. The “T-shaped’” area around forehead is vulnerable to injury. Total cost of medical care benefits per patient in tertiary hospitals was about 7 times on average than in health agencies. Regarding functional, behavioral, and aesthetic outcomes, more attention should be paid to epidemiologic data and hospital costs for facial lacerations. 相似文献
15.
Hepatitis E virus (HEV) is the most common cause of acute liver failure (LF) and one of the most common factors causing acute injury in acute-on-chronic LF (ACLF). When HEV-related LF occurs, a series of changes take place in both the intrahepatic environment and extrahepatic microenvironment. The changed types and distribution of immune cells (infiltrating macrophages and increased lymphocytes) in liver tissue, as well the increased proinflammatory cytokines and chemokines in the blood, indicate that the occurrence and progression of HEV-related LF are closely related to immune imbalance. The clinical features and immune reaction in the body during HEV-related acute LF (ALF) and ACLF are complicated. This review highlights recent progress in elucidating the clinical manifestations of HEV-associated ALF and ACLF and discusses the corresponding systemic immune changes and possible regulatory mechanisms. 相似文献
16.
17.
18.
19.
Clinical usefulness of intraductal ultrasonography for the management of acute biliary pancreatitis 下载免费PDF全文
20.