全文获取类型
收费全文 | 902篇 |
免费 | 107篇 |
国内免费 | 17篇 |
专业分类
耳鼻咽喉 | 4篇 |
儿科学 | 37篇 |
妇产科学 | 13篇 |
基础医学 | 140篇 |
口腔科学 | 8篇 |
临床医学 | 85篇 |
内科学 | 151篇 |
皮肤病学 | 19篇 |
神经病学 | 153篇 |
特种医学 | 58篇 |
外科学 | 54篇 |
综合类 | 62篇 |
预防医学 | 41篇 |
眼科学 | 5篇 |
药学 | 117篇 |
肿瘤学 | 79篇 |
出版年
2021年 | 8篇 |
2019年 | 9篇 |
2018年 | 11篇 |
2017年 | 9篇 |
2016年 | 9篇 |
2015年 | 17篇 |
2014年 | 17篇 |
2013年 | 49篇 |
2012年 | 44篇 |
2011年 | 35篇 |
2010年 | 27篇 |
2009年 | 32篇 |
2008年 | 36篇 |
2007年 | 40篇 |
2006年 | 27篇 |
2005年 | 27篇 |
2004年 | 30篇 |
2003年 | 36篇 |
2002年 | 27篇 |
2001年 | 31篇 |
2000年 | 28篇 |
1999年 | 25篇 |
1998年 | 35篇 |
1997年 | 31篇 |
1996年 | 21篇 |
1995年 | 17篇 |
1994年 | 25篇 |
1993年 | 17篇 |
1992年 | 14篇 |
1991年 | 18篇 |
1990年 | 14篇 |
1989年 | 25篇 |
1988年 | 24篇 |
1987年 | 15篇 |
1986年 | 14篇 |
1985年 | 20篇 |
1984年 | 8篇 |
1983年 | 12篇 |
1982年 | 9篇 |
1981年 | 13篇 |
1980年 | 10篇 |
1979年 | 12篇 |
1978年 | 12篇 |
1977年 | 8篇 |
1976年 | 6篇 |
1974年 | 6篇 |
1973年 | 4篇 |
1971年 | 11篇 |
1970年 | 4篇 |
1967年 | 5篇 |
排序方式: 共有1026条查询结果,搜索用时 861 毫秒
31.
S K Bansal P C Gautam S P Sahi S K Basu J M Lennox A J Warrington 《Age and ageing》1987,16(5):279-284
Ninety-two consecutive elderly patients suffering from acute gastrointestinal bleeding were studied over a 3-year period. All were admitted to a specially designated Geriatric/Surgical Ward under the care of consultant physicians in geriatric medicine. The nurses were trained to look after acute surgical and geriatric patients. Patients were aged between 65 and 93 years. All were managed jointly by the surgeons and physicians. Only 13 needed emergency surgery which was preceded by urgent endoscopy. The rest were managed conservatively with intravenous cimetidine and blood transfusions as required. The overall mortality was low at 5.4%. It is concluded that in a series of elderly patients with acute gastrointestinal bleeding the mortality was not high in a unit where the management was conservative and there was joint care between geriatricians and surgeons. 相似文献
32.
33.
34.
35.
An investigation of non-verbal auditory comprehension in two patients with global aphasia following stroke is reported. The primary aim of the investigation was to establish whether refractory access disorders can affect non-verbal input modalities. All previous reports of refractoriness, a cognitive syndrome characterized by response inconsistency, sensitivity to temporal factors and insensitivity to item frequency, have involved comprehension tasks which have a verbal component. Two main experiments are described. The first consists of a novel sound-to-picture and sound-to-word matching task in which comprehension of environmental sounds is probed under conditions of semantic relatedness and semantic unrelatedness. In addition to the two stroke patients, the performance of a group of 10 control patients with non-vascular pathology is reported, along with evidence of semantic relatedness effects in sound comprehension. The second experiment examines environmental sound comprehension within a repetitive probing paradigm which affords assessment of the effects of semantic relatedness, response consistency and presentation rate. It is demonstrated that the two stroke patients show a significant increase in error rate across multiple probes of the same set of sound stimuli, indicating the presence of refractoriness within this non-verbal domain. The implications of the results are discussed with reference to our current understanding of the mechanisms of refractoriness. 相似文献
36.
37.
AP Mishreki E Lim P Cranefield S Pascoe S Jackson DA Stell 《Annals of the Royal College of Surgeons of England》2013,95(5):349-352
Introduction
The results of surgical resection and palliative chemotherapy use in hilar cholangiocarcinoma (HC) have been well publicised but the proportion of patients able to undergo these treatments and the comparative outcomes in a population of patients with HC are less well known.Methods
Patients with HC were identified by review of all patients undergoing percutaneous cholangiography over a nine-year period (2002–2010) in a tertiary facility. The treatment undertaken and outcomes were recorded.Results
Overall, 68 patients were identified (37 female) with a median age of 70 years. Forty-five (66%) were treated solely by insertion of a metal stent (median survival 4.73 months) and nine (13%) also received palliative chemotherapy (median survival 13.7 months). Persisting jaundice after stent insertion was noted in 18 of 35 patients (51%) tested within one month of death. Fourteen patients (21%) underwent surgical resection (median survival 20.2 months).Conclusions
Patients undergoing surgical resection had significantly longer survival than those receiving only a palliative stent but not compared with those also receiving palliative chemotherapy, with short-term follow-up. Only a third of patients, however, receive active treatment (surgery or chemotherapy) and improvements in long-term biliary palliation are needed. 相似文献38.
39.
Bharath?Wootla Aleksandar?Denic Jens?O.?Watzlawik Arthur?E.?Warrington Laurie?J.?Zoecklein Louisa?M.?Papke-Norton Chella?David Moses?RodriguezEmail authorView authors OrcID profile 《Journal of neuroinflammation》2016,13(1):293
Background
We investigated the role of human HLA class I molecules in persistent central nervous system (CNS) injury versus repair following virus infection of the CNS.Methods
Human class I A11+ and B27+ transgenic human beta-2 microglobulin positive (Hβ2m+) mice of the H-2 b background were generated on a combined class I-deficient (mouse beta-2 microglobulin deficient, β2m0) and class II-deficient (mouse Aβ0) phenotype. Intracranial infection with Theiler’s murine encephalomyelitis virus (TMEV) in susceptible SJL mice results in acute encephalitis with prominent injury in the hippocampus, striatum, and cortex.Results
Following infection with TMEV, a picornavirus, the Aβ0.β2m0 mice lacking active immune responses died within 18 to 21 days post-infection. These mice showed severe encephalomyelitis due to rapid replication of the viral genome. In contrast, transgenic Hβ2m mice with insertion of a single human class I MHC gene in the absence of human or mouse class II survived the acute infection. Both A11+ and B27+ mice significantly controlled virus RNA expression by 45 days and did not develop late-onset spinal cord demyelination. By 45 days post-infection (DPI), B27+ transgenic mice showed almost complete repair of the virus-induced brain injury, but A11+ mice conversely showed persistent severe hippocampal and cortical injury.Conclusions
The findings support the hypothesis that the expression of a single human class I MHC molecule, independent of persistent virus infection, influences the extent of sub frequent chronic neuronal injury or repair in the absence of a class II MHC immune response.40.
John Ford Matt Lawson David Fowler Nobuko Maruyama Seiji Mito Koichi Tomiyasu Shuji Kinoshita Chisa Suzuki Atsuhiro Kawaguchi Patrick Round Malcolm Boyce Steve Warrington Werner Weber Sander van Deventer John J P Kastelein 《British journal of clinical pharmacology》2014,78(3):498-508