全文获取类型
收费全文 | 2467篇 |
免费 | 177篇 |
国内免费 | 16篇 |
专业分类
耳鼻咽喉 | 16篇 |
儿科学 | 55篇 |
妇产科学 | 25篇 |
基础医学 | 318篇 |
口腔科学 | 62篇 |
临床医学 | 252篇 |
内科学 | 605篇 |
皮肤病学 | 62篇 |
神经病学 | 118篇 |
特种医学 | 149篇 |
外国民族医学 | 1篇 |
外科学 | 307篇 |
综合类 | 194篇 |
一般理论 | 3篇 |
预防医学 | 105篇 |
眼科学 | 39篇 |
药学 | 127篇 |
中国医学 | 3篇 |
肿瘤学 | 219篇 |
出版年
2023年 | 19篇 |
2022年 | 55篇 |
2021年 | 130篇 |
2020年 | 63篇 |
2019年 | 62篇 |
2018年 | 80篇 |
2017年 | 56篇 |
2016年 | 60篇 |
2015年 | 85篇 |
2014年 | 98篇 |
2013年 | 104篇 |
2012年 | 135篇 |
2011年 | 171篇 |
2010年 | 93篇 |
2009年 | 97篇 |
2008年 | 89篇 |
2007年 | 94篇 |
2006年 | 92篇 |
2005年 | 94篇 |
2004年 | 81篇 |
2003年 | 77篇 |
2002年 | 67篇 |
2001年 | 47篇 |
2000年 | 68篇 |
1999年 | 48篇 |
1998年 | 39篇 |
1997年 | 31篇 |
1996年 | 37篇 |
1995年 | 25篇 |
1994年 | 29篇 |
1993年 | 32篇 |
1992年 | 28篇 |
1991年 | 34篇 |
1990年 | 19篇 |
1989年 | 34篇 |
1988年 | 24篇 |
1987年 | 22篇 |
1986年 | 23篇 |
1985年 | 27篇 |
1984年 | 13篇 |
1983年 | 18篇 |
1982年 | 15篇 |
1981年 | 12篇 |
1980年 | 14篇 |
1979年 | 15篇 |
1978年 | 10篇 |
1977年 | 12篇 |
1957年 | 9篇 |
1949年 | 8篇 |
1948年 | 8篇 |
排序方式: 共有2660条查询结果,搜索用时 0 毫秒
1.
O. A. MIRGHANI† E. O. EL AMIN† M. E. S. ALI† H. S. OSMAN‡ B. HAMAD§ 《Medical education》1988,22(4):314-316
The community-based course presented is a longitudinal course running through four semesters in the Faculty of Medicine, University of Gezira, Sudan. Students combine their regular work in primary health care centres with attachments to a number of families in Wad Medani town. They continue to visit these families regularly throughout their entire medical course with the aim of studying them and helping them with some of their medical and psychosocial problems. 相似文献
2.
3.
Abstract We previously demonstrated that cytomegalovirus (CMV) infection enhanced perivascular inflammation in rat aortic allografts. In this study, we investigated the relationship between the CMV infection load and the magnitude of perivasculitis (chronic rejection) in aortic transplants. Rats received or-thotopic abdominal aortic grafts, different degrees of total body irradiation (TBI) for immunosuppres-sion and CMV inoculation. The spleens of the rats receiving 5 Gy of TBI contained more infectious virus and viral antigens than those of rats receiving 3 Gy of TBI or no TBI. Although the number of inflammatory cells infiltrating the perivascular area was decreased after TBI, CMV infection resulted in increased perivasculitis in rats that received 5 Gy of TBI as compared to non-infected animals. This virus-induced effect was characterized predominantly by an increased T-cell infiltration, including CD4 and CD8 T-cells. It is concluded that an enhanced systemic CMV infection during severe immunosuppressive therapy can accelerate the development of chronic rejection, which seems to be mediated mainly by T-cells. 相似文献
4.
CG Teo 《Oral diseases》2002,8(S2):88-90
Oral hairy leukoplakia (OHL) and Kaposi's sarcoma (KS) are commonly encountered in the HIV-infected patient. A unique feature of OHL is non-cytolytic high level of replication of Epstein–Barr virus (EBV) in the glossal epithelium. The expression of viral-encoded anti-apoptotic proteins concomitant to replicative proteins probably underlies this phenomenon. The question of whether OHL arises from activation of EBV latent in the tongue, or from superinfection by endogenous EBV shed via non-glossal sites or by exogenous EBV remains unresolved. Human herpesvirus 8 (HHV8) is now seen as necessary but not sufficient cause of KS. Expression of HHV8-encoded oncogenic proteins in endothelial cells probably explains the aberrant proliferation of these cells in KS lesions. Studies into why KS is so commonly observed at the palate in HIV-infected patients may provide important clues to its pathogenesis. 相似文献
5.
6.
A sciatic nerve lesion is uncommon. We report the utility of the endoscope in an 18-year-old female with multiple lesions of her sciatic nerve. Somatosensory evoked potentials and MRI were indicative of a sciatic nerve lesion. We describe a simple technique of endoscopic exploration of the sciatic nerve to assist intraoperative decision making. 相似文献
7.
Yasser EMAD Yasser RAGAB Ahmed EL‐MARAKBI Salama MOHAMED HANFI 《International journal of rheumatic diseases》2007,10(4):326-329
A 48‐year‐old male patient with long‐standing ulcerative colitis since February 2001 which was diagnosed by endoscopy, developed acute digital ischemia affecting both hands with fixed colour changes in the left index finger which was followed shortly by digital ulceration. Magnetic resonance angiography (MRA) of both upper limbs showed evidence of vasculitis affecting digital arterioles on both sided and right subclavian occlusion. The patient received pulse methylprednisolone followed by cyclophosphamide pulse therapy, the latter continuing on a monthly basis for 6 months with appreciable improvement and remission of the vasculitic process; follow‐up MRA showed reperfusion of the previously occluded subcalvian artery. To the authors’ knowledge vasculitis complicating the course of ulcerative colitis is a rare association and is only sporadically reported in the literature. This rare entity should be diagnosed early and aggressively treated; MRA is a very promising diagnostic tool that is suitable for both diagnosis and follow‐up of patients with this rare entity. 相似文献
8.
Despite empirical evidence that cardiac rehabilitation programs can play a significant role in enhancing recovery following a primary cardiac event and in enacting secondary prevention measures, attendance rates remain remarkably low. Referral and attendance at cardiac rehabilitation programs are not one and the same. Recognizing this, issues related to the referral of eligible patients to cardiac rehabilitation and factors that affect patients' decisions regarding attendance must be identified and addressed. This article presents an overview of the potential benefits of cardiac rehabilitation programs, describes salient issues related to referral and attendance, and identifies directions for future research. 相似文献
9.
A J Buckton R Kulasegaram S L Ngui M Fisher R James S Rangarajan C G Teo 《Journal of clinical virology》2007,40(1):60-63
An HIV-1/hepatitis C virus (HCV) co-infected patient with haemophilia received a 48-week course of pegylated interferon-alpha-2b and ribavirin therapy for genotype 5a HCV infection. Virological response was achieved at week 24. At the end of treatment, HCV RNA in serum was detected and identified to belong to genotype 2b, rather than genotype 5a. A sensitive method for identifying minority HCV genotypes in pre-treatment serum showed genotype 2b HCV carriage prior to treatment. Sequencing the interferon sensitivity-determining region of the HCV NS5A gene obtained from pre-, intra- and post-treatment sera revealed emergence of quasispecies bearing R-->K and M-->A/T mutations at codons 2222 and 2223, respectively. Occult presence of minority HCV subpopulations and their acquisition of mutations following therapy can result in poor treatment outcome. 相似文献