全文获取类型
收费全文 | 1309篇 |
免费 | 74篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 65篇 |
妇产科学 | 31篇 |
基础医学 | 119篇 |
口腔科学 | 12篇 |
临床医学 | 138篇 |
内科学 | 444篇 |
皮肤病学 | 70篇 |
神经病学 | 74篇 |
特种医学 | 20篇 |
外科学 | 265篇 |
综合类 | 12篇 |
预防医学 | 27篇 |
眼科学 | 34篇 |
药学 | 23篇 |
中国医学 | 3篇 |
肿瘤学 | 46篇 |
出版年
2023年 | 9篇 |
2022年 | 14篇 |
2021年 | 32篇 |
2020年 | 17篇 |
2019年 | 32篇 |
2018年 | 32篇 |
2017年 | 17篇 |
2016年 | 25篇 |
2015年 | 24篇 |
2014年 | 37篇 |
2013年 | 38篇 |
2012年 | 75篇 |
2011年 | 79篇 |
2010年 | 50篇 |
2009年 | 58篇 |
2008年 | 73篇 |
2007年 | 74篇 |
2006年 | 75篇 |
2005年 | 74篇 |
2004年 | 67篇 |
2003年 | 57篇 |
2002年 | 42篇 |
2001年 | 29篇 |
2000年 | 36篇 |
1999年 | 32篇 |
1998年 | 20篇 |
1997年 | 14篇 |
1996年 | 5篇 |
1995年 | 10篇 |
1994年 | 6篇 |
1992年 | 22篇 |
1991年 | 23篇 |
1990年 | 26篇 |
1989年 | 19篇 |
1988年 | 14篇 |
1987年 | 14篇 |
1986年 | 16篇 |
1985年 | 6篇 |
1984年 | 12篇 |
1983年 | 10篇 |
1982年 | 5篇 |
1980年 | 6篇 |
1979年 | 8篇 |
1978年 | 4篇 |
1977年 | 4篇 |
1974年 | 8篇 |
1972年 | 8篇 |
1966年 | 3篇 |
1964年 | 3篇 |
1948年 | 4篇 |
排序方式: 共有1389条查询结果,搜索用时 15 毫秒
91.
Tonsillitis is one of the most prevalent infections in children and adolescents. The etiologic agents might be viral or bacterial.
About 30% of cases are reported to be of bacterial origin, mainly due to group A Streptococcus (GAS). Although in most instances GAS tonsillitis is a self-limited disease, antibiotic treatment is recommended, mainly
to prevent the suppurative and nonsuppurative poststreptococcal sequelae of acute rheumatic fever and to prevent glomerulonephritis.
In this paper we review the current knowledge of the etiology of acute and recurrent GAS tonsillitis, with special emphasis
on a recent hypothesis regarding the etiology of bacterial eradication failure. While penicillin V remains the drug of choice
for acute tonsillitis, other antibiotics are being approved and recommended for particular indications in both Europe and
the United States. 相似文献
92.
False-positive urine cultures using bag collection 总被引:1,自引:0,他引:1
93.
94.
95.
Common general anesthetics administered to young rats at the peak of brain development cause widespread apoptotic neurodegeneration in their immature brain. Behavioral studies have shown that this leads to learning and memory deficiencies later in life. The subiculum, a part of the hippocampus proper and Papez’s circuit, is involved in cognitive development and is vulnerable to anesthesia-induced developmental neurodegeneration. This degeneration is manifested by acute substantial neuroapoptotic damage and permanent neuronal loss in later stages of synaptogenesis. Since synapse formation is a critical component of brain development, we examined the effects of highly neurotoxic anesthesia combination (isoflurane, nitrous oxide, and midazolam) on ultrastructural development of synapses in the rat subiculum. We found that this anesthesia, when administered at the peak of synaptogenesis, causes long-lasting injury to the subicular neuropil. This is manifested as neuropil scarcity and disarray, morphological changes indicative of mitochondria degeneration, a decrease in the number of neuronal profiles with multiple synaptic boutons and significant decreases in synapse volumetric densities. We believe that observed morphological disturbances of developing synapses may, at least in part, contribute to the learning and memory deficits that occur later in life after exposure of the immature brain to general anesthesia. 相似文献
96.
Doron Boltin Michal Katzir Victoria Bugoslavsky Irma Yalashvili Tal Brosh-Nissimov Moti Fried Ori Elkayam 《European Journal of Internal Medicine》2009,20(3):e49-e52
We report one case of infective endocarditis and two cases of arthritis due to Corynebacterium striatum. After reviewing all previously reported cases, we illustrate the clinical features typical of infection, including nosocomial risk factors and prominent embolic phenomena in the cases of endocarditis. Our cases underscore the importance of prompt diagnosis when confronted with positive blood and synovial cultures. This ubiquitous organism and common contaminant is a rare yet deadly pathogen. 相似文献
97.
98.
99.
To define the frequency, natural history and clinical correlates of the murmur of mitral regurgitation (MR) detected after myocardial infarction, clinical data from 849 patients with documented acute myocardial infarction were analyzed. A murmur suggestive of MR was present on admission in 76 patients (9%). Patients with MR on admission were older and more apt to be female and nonwhite. They also had a significantly greater frequency of prior infarction and signs and symptoms of congestive heart failure. There was no difference in the location (anterior or inferior) of infarction. Patients with MR on admission had a 36% mortality compared to 16% for those who developed MR later in the hospitalization and 15% for those without MR by auscultation (p less than 0.001). Correction for differences in baseline variables indicated that the presence of MR on admission did not contribute independently to mortality. Thus, the murmur of MR derives its prognostic significance from integration of multiple clinical, radiographic and electrocardiographic characteristics. 相似文献
100.
Renal angiomyolipoma with arteriovenous shunting 总被引:1,自引:0,他引:1
I M Barzilai G L Braden L D Ford L H Goodman R J Delima M J Germain J P Fitzgibbons 《The Journal of urology》1987,137(3):483-484
We describe a patient with arteriovenous shunting during renal arteriography who at operation was found to have an angiomyolipoma rather than renal cell carcinoma or an arteriovenous malformation. Renal angiomyolipoma should be added to the list of causes of gross hematuria with angiographically demonstrable arteriovenous shunting. 相似文献