全文获取类型
收费全文 | 1392518篇 |
免费 | 89773篇 |
国内免费 | 1784篇 |
专业分类
耳鼻咽喉 | 18820篇 |
儿科学 | 39314篇 |
妇产科学 | 34503篇 |
基础医学 | 211948篇 |
口腔科学 | 39211篇 |
临床医学 | 122516篇 |
内科学 | 265514篇 |
皮肤病学 | 29718篇 |
神经病学 | 101834篇 |
特种医学 | 54238篇 |
外国民族医学 | 130篇 |
外科学 | 220348篇 |
综合类 | 24836篇 |
现状与发展 | 2篇 |
一般理论 | 332篇 |
预防医学 | 95785篇 |
眼科学 | 31828篇 |
药学 | 108053篇 |
4篇 | |
中国医学 | 3136篇 |
肿瘤学 | 82005篇 |
出版年
2018年 | 13803篇 |
2017年 | 10451篇 |
2016年 | 11799篇 |
2015年 | 13329篇 |
2014年 | 18117篇 |
2013年 | 26639篇 |
2012年 | 37472篇 |
2011年 | 40077篇 |
2010年 | 23498篇 |
2009年 | 21934篇 |
2008年 | 38213篇 |
2007年 | 40809篇 |
2006年 | 41159篇 |
2005年 | 39444篇 |
2004年 | 38303篇 |
2003年 | 36877篇 |
2002年 | 36006篇 |
2001年 | 73272篇 |
2000年 | 75586篇 |
1999年 | 62774篇 |
1998年 | 15239篇 |
1997年 | 13253篇 |
1996年 | 13332篇 |
1995年 | 12476篇 |
1994年 | 11393篇 |
1993年 | 10678篇 |
1992年 | 47698篇 |
1991年 | 47351篇 |
1990年 | 46321篇 |
1989年 | 45210篇 |
1988年 | 41325篇 |
1987年 | 40535篇 |
1986年 | 37722篇 |
1985年 | 36097篇 |
1984年 | 26040篇 |
1983年 | 22139篇 |
1982年 | 11436篇 |
1979年 | 23690篇 |
1978年 | 16236篇 |
1977年 | 13596篇 |
1976年 | 12768篇 |
1975年 | 14593篇 |
1974年 | 17142篇 |
1973年 | 16271篇 |
1972年 | 15325篇 |
1971年 | 14575篇 |
1970年 | 13798篇 |
1969年 | 12901篇 |
1968年 | 11940篇 |
1967年 | 10723篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
Recurrent erosion 总被引:1,自引:0,他引:1
93.
94.
95.
96.
Six patients who injured their wrists had radiographs documenting a dorsal, 5- to 10-mm oblong fragment of bone immediately proximal to the base of the fourth and/or fifth metacarpal bones. The fragment was seen on the pronation oblique and/or lateral projections, but not on the posteroanterior projection. The radiographic appearance of the fragment was remarkably similar in all cases. In the one patient in which it was performed, pluridirectional tomography demonstrated that the fragment originated from the dorsal surface of the hamate. Five of the six patients also had associated posterior dislocation of the fourth and/or fifth metacarpals. We conclude that this fragment represents a coronal fracture through the body of the hamate resulting from posterior dislocation or subluxation of the fourth and/or fifth metacarpal. 相似文献
97.
Electrocardiographic symptoms were evaluated in 53 patients with an additional left-ventricular chorda (ALVC), detected by two-dimensional echocardiography. Signs of early ventricular repolarization (EVR) were identified in 45 (84.9%) patients. A transverse ALVC was more common in EVR-free patients (87.5%), as compared to patients with ALVC + EVR combinations (51.1%; p less than 0.05). 相似文献
98.
In the isolated perfused rat pancreas, D,L-difluoromethylornithine, tested at a concentration of 3 mmol/L, failed to affect the release of glucagon and insulin caused, over 15 min stimulation, by either L-arginine or L-ornithine (2.0, 5.0 or 10.0 mmol/L) in the presence of either 3.3 or 5.6 mmol/L D-glucose. The inhibition of ornithine decarboxylase also failed to affect the release of glucagon provoked by either L-leucine (2 or 3 mmol/L) or L-glutamine (2 mmol/L) and the secretion of insulin stimulated by a rise in glucose concentration from 5.6 to 10.6 mmol/L. These data are interpreted to suggest that the rapid generation of polyamines from either L-arginine or L-ornithine does not play any significant role in the immediate glucagonotropic and insulinotropic action of these cationic amino acids. 相似文献
99.
This article examines the discussions at the Workshop on MeasuringHealth Behaviour and Health: towards New Health Promotion Indicatorscentred on the main areas of health promotion: reviewing thestate of the art in the field of health promotion indicators,clarifying problems with current health indicators, and helpingto establish a network of institutions and individuals activein health indicator development. The Berne Workshop revealedthe differences in opinions on health promotion indicators andconcluded that the present state of the art in the field wasquite unsatisfactory. The author1 concludes by setting out sixspecific recommendations for the improvement of the currentsituation. 相似文献
100.
A Watanabe K Ohizumi M Motomiya K Takeuchi T Yoshida S Ida Y Miura K Nishioka Y Tanno T Takishima 《The Japanese journal of antibiotics》1990,43(8):1392-1401
We evaluated the therapeutic efficacy of miconazole (MCZ, Florid-F inj.), a new antifungal agent for parenteral use, in deep-seated fungal infections of respiratory tract system. A daily dose of 400-1,800 mg of MCZ was given intravenously for 12-38 days (mean: 23.4 days) to 7 patients: 2 patients with pulmonary aspergillosis, 1 patient with bronchial aspergillosis, 1 patient with pulmonary candidiasis and 3 patients with candidemia. One additional patient with pulmonary aspergillosis received three instillations of 20 mg of MCZ into the thoracic cavity. The clinical effects were excellent in 1, good in 4 and poor in 3 patients. The efficacy rate was 100% in 5 cases with respiratory fungal infections but 3 cases with candidemia did not respond well to the treatment. Four strains each of Aspergillus sp. and Candida sp. were identified as causative organisms. Seven of the 8 strains were eradicated by administration of MCZ. Side effects observed were irritation and heat in a leg in 1 patient, hyperlipoidemia in 2 patients and eosinophilia in 1 patient. The adverse reactions disappeared after the completion of the therapy. From the above results, we conclude that MCZ is one of the most useful antifungal agents for parenteral use as a first choice on deep-seated fungal infections in the respiratory tract. 相似文献