全文获取类型
收费全文 | 20244篇 |
免费 | 2009篇 |
国内免费 | 23篇 |
专业分类
耳鼻咽喉 | 269篇 |
儿科学 | 719篇 |
妇产科学 | 564篇 |
基础医学 | 2889篇 |
口腔科学 | 630篇 |
临床医学 | 2442篇 |
内科学 | 3747篇 |
皮肤病学 | 351篇 |
神经病学 | 1769篇 |
特种医学 | 794篇 |
外科学 | 2457篇 |
综合类 | 506篇 |
一般理论 | 9篇 |
预防医学 | 2132篇 |
眼科学 | 311篇 |
药学 | 1593篇 |
中国医学 | 26篇 |
肿瘤学 | 1068篇 |
出版年
2021年 | 341篇 |
2020年 | 207篇 |
2019年 | 328篇 |
2018年 | 391篇 |
2017年 | 294篇 |
2016年 | 309篇 |
2015年 | 351篇 |
2014年 | 487篇 |
2013年 | 690篇 |
2012年 | 908篇 |
2011年 | 936篇 |
2010年 | 595篇 |
2009年 | 494篇 |
2008年 | 894篇 |
2007年 | 899篇 |
2006年 | 907篇 |
2005年 | 781篇 |
2004年 | 755篇 |
2003年 | 702篇 |
2002年 | 704篇 |
2001年 | 630篇 |
2000年 | 660篇 |
1999年 | 534篇 |
1998年 | 264篇 |
1997年 | 202篇 |
1996年 | 223篇 |
1995年 | 213篇 |
1994年 | 187篇 |
1993年 | 215篇 |
1992年 | 454篇 |
1991年 | 426篇 |
1990年 | 424篇 |
1989年 | 440篇 |
1988年 | 430篇 |
1987年 | 338篇 |
1986年 | 358篇 |
1985年 | 391篇 |
1984年 | 268篇 |
1983年 | 216篇 |
1982年 | 162篇 |
1981年 | 166篇 |
1979年 | 214篇 |
1978年 | 188篇 |
1977年 | 202篇 |
1976年 | 173篇 |
1975年 | 165篇 |
1974年 | 172篇 |
1973年 | 181篇 |
1972年 | 169篇 |
1971年 | 163篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Fabian M. Laage Gaupp Nadia Solomon Ivan Rukundo Azza A. Naif Erick M. Mbuguje Anish Gonchigar Minzhi Xing John D. Prologo Douglas D. Silin Frank J. Minja 《Journal of vascular and interventional radiology : JVIR》2019,30(12):2036-2040
Despite a population of nearly 60 million, there is currently not a single interventional radiologist in Tanzania. Based on an Interventional Radiology (IR) Readiness Assessment, the key obstacles to establishing IR in Tanzania are the lack of training opportunities and limited availability of disposable equipment. An IR training program was designed and initiated, which relies on US-based volunteer teams of IR physicians, nurses, and technologists to locally train radiology residents, nurses, and technologists. Preliminary results support this strategy for addressing the lack of training opportunities and provide a model for introducing IR to other resource-limited settings. 相似文献
2.
3.
Phantana-angkool April Voci Amy E. Warren Yancey E. Livasy Chad A. Beasley Lakesha M. Robinson Myra M. Hadzikadic-Gusic Lejla Sarantou Terry Forster Meghan R. Sarma Deba White Richard L. 《Annals of surgical oncology》2019,26(12):3874-3882
Annals of Surgical Oncology - The role of sentinel lymph node biopsy (SLNB) when ductal carcinoma in situ with microinvasion (DCISM) is identified on core biopsy is unclear. Our aim was to assess... 相似文献
4.
5.
Using indirect immunohistochemistry and an antiserum raised against rat corticotrophin-releasing factor (CRF) we have outlined an asymmetric network of cells and varicose fibers in sheep adrenal cortex. This network was not associated with the larger splanchnic nerves, but was occasionally found in small bundles or with blood vessels; in most instances fibers were found weaving independently through cortical parenchyma. A plexus of fibers was found in the zona reticularis, with a few fibers ramifying into adjacent medulla. Uni or bipolar cells were found throughout the cortex, with the greatest frequency at the corticomedullary junction; a multipolar-type cell was also found in this area. Staining of varicose structures and most cells was abolished by incubation with excess rat CRF 1-41, but not by ovine CRF or a range of other peptides. Though the immunoreactive species has not as yet been identified, it may thus share homology with sequences present in rat but not ovine CRF. 相似文献
6.
The use of additional epidural sympathetic block during and after microvascular surgery in the lower extremities to prevent vasospasm is generally agreed on. However, a significant fall in the perfusion rate of the transplants was seen after application of bupivacaine (Marcain) via the epidural catheter. This effect has, to our knowledge, not been described before and is probably caused by the sympathectomy effect of this type of analgesia. 相似文献
7.
8.
9.
10.