全文获取类型
收费全文 | 178308篇 |
免费 | 6774篇 |
国内免费 | 375篇 |
专业分类
耳鼻咽喉 | 2418篇 |
儿科学 | 5067篇 |
妇产科学 | 4186篇 |
基础医学 | 25769篇 |
口腔科学 | 6084篇 |
临床医学 | 10241篇 |
内科学 | 38663篇 |
皮肤病学 | 4855篇 |
神经病学 | 14241篇 |
特种医学 | 4545篇 |
外国民族医学 | 1篇 |
外科学 | 21397篇 |
综合类 | 818篇 |
一般理论 | 36篇 |
预防医学 | 20873篇 |
眼科学 | 4641篇 |
药学 | 13629篇 |
中国医学 | 706篇 |
肿瘤学 | 7287篇 |
出版年
2023年 | 871篇 |
2022年 | 655篇 |
2021年 | 2656篇 |
2020年 | 1529篇 |
2019年 | 2984篇 |
2018年 | 5218篇 |
2017年 | 3263篇 |
2016年 | 3279篇 |
2015年 | 3651篇 |
2014年 | 4033篇 |
2013年 | 6202篇 |
2012年 | 10693篇 |
2011年 | 11283篇 |
2010年 | 5592篇 |
2009年 | 4139篇 |
2008年 | 9312篇 |
2007年 | 9960篇 |
2006年 | 9578篇 |
2005年 | 9237篇 |
2004年 | 8596篇 |
2003年 | 8069篇 |
2002年 | 7741篇 |
2001年 | 5217篇 |
2000年 | 5790篇 |
1999年 | 4412篇 |
1998年 | 841篇 |
1992年 | 2407篇 |
1991年 | 2143篇 |
1990年 | 2150篇 |
1989年 | 1893篇 |
1988年 | 1765篇 |
1987年 | 1681篇 |
1986年 | 1688篇 |
1985年 | 1629篇 |
1984年 | 1175篇 |
1983年 | 1038篇 |
1979年 | 1339篇 |
1978年 | 912篇 |
1977年 | 903篇 |
1976年 | 829篇 |
1975年 | 964篇 |
1974年 | 1183篇 |
1973年 | 1236篇 |
1972年 | 1158篇 |
1971年 | 1139篇 |
1970年 | 1051篇 |
1969年 | 1134篇 |
1968年 | 1139篇 |
1967年 | 1019篇 |
1966年 | 926篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
H Riedmiller R Bürger S Müller J Thüroff R Hohenfellner 《The Journal of urology》1990,143(6):1115-1117
The submucosally embedded in situ appendix guarantees an ideal continence mechanism in patients with ileocecal urinary reservoirs. To date this modification of the Mainz pouch technique has been performed successfully in 13 patients. The appendicocutaneous stoma was placed at the lower right abdominal quadrant in 12 patients and into the umbilical funnel in 1. Urodynamic investigations of the submucosally embedded appendix showed a maximum closure pressure of more than 80 cm. water in pressure profiles. Only 1 case of stomal stenosis required reoperation. 相似文献
72.
C Csonka G Gyurkó P Halász G Vekszler 《Magyar traumatológia, orthopaedia és helyreállító sebészet》1990,33(1):46-50
Authors report on arterial injuries in a 2-year material of hand injured. The combination of injuries observed and the methods of treatment are described. Attention is called to the fact, that because of anatomical characteristics of these regions, the diagnosis of arterial injuries is not always easy. Four cases of their own are briefly described in whom the arterial injury could be stated only at the development of complications (pulsating haematoma, false aneurysm, later bleeding). The importance of the primary careful treatment and the significance of the examination of the circulation (Allen's test, Doppler) are stressed. 相似文献
73.
T Juhás 《Ceskoslovenská oftalmologie》1990,46(5):367-370
Based on repeated fluoroangiographic examinations in a group of 28 children with type I diabetes mellitus the authors observed progressing diabetic retinal changes. At the end of the three-year observation period they found progress in 32% of the children. They investigated influence of risk factors such as age, duration of the basic disease, its metabolic compensation, sex and HLA typing on the development of diabetic retinopathy. 相似文献
74.
Study of the lens epithelial cell density in cataractous eyes operated on with extracapsular and intercapsular techniques 总被引:1,自引:0,他引:1
Epithelial cell counting was performed in 47 fragments from lens anterior capsules obtained during extracapsular and intercapsular surgery. Mean cell count was 3,277 cell/mm2; there was no correlation between cell number and age and no significant difference in cell counts between extracapsular and intercapsular surgery. There were, however, significant differences between advanced cataracts and the other cataract types (2,947 vs. 3,356). This may be important in explaining the differences in regenerative opacification of the posterior capsule in the different types of cataracts. 相似文献
75.
J V Pernía Morán P Rubio Pascual C Siminiani I Lahoz 《Revista espa?ola de anestesiología y reanimación》1990,37(2):98-100
We report the case of a 32-year-old multipara who presented preeclampsia on the fourth day after childbirth without receiving proper treatment that progressed to eclampsia 4 days later. Pregnancy and delivery had been uneventful. The patient presented proteinuria (30 mg/dl), serum total proteins 5.3 g/dl and serum albumin 3.3 g/dl. Blood pressure was controlled with methyldopa, 500 mg at six-hour intervals by intravenous route. The patient presented hypoxemia secondary to bilateral pleural effusion and aspirative pneumonia requiring mechanical ventilation and invasive hemodynamic monitoring. Treatment with cefotaxime, 1 g at six-hour intervals by intravenous route and clindamycin, 600 mg at six-hour intervals by intravenous route was initiated. Sedation was maintained with thiopental sodium, 3 mg/kg/hour in continuous infusion. At dismission, the patient was completely recovered from her clinical picture and needed no antihypertensive therapy. Physiopathologic features and the aforementioned complications are discussed with particular reference to differential diagnosis. 相似文献
76.
Laorden M. L. Miralles F. S. Cárceles M. D. Hernández J. Puig M. M. 《Journal canadien d'anesthésie》1990,37(4):482-485
Canadian Journal of Anesthesia/Journal canadien d'anesthésie - The aim of the present study was to examine whether changes in temperature alter the effects of halothane and isoflurane on... 相似文献
77.
Anya Pimentel Gomes Fernandes Vieira Jose Maria Sampaio Meneses Jr Renato Luiz Maia 《Journal of oral pathology & medicine》2007,36(2):117-119
Cementoblastomas are benign lesions of the odontogenic ectomesenchyme that rarely occur related to the primary dentition, especially on the left side of the mandible. This study describes a case of a true cementoblastoma related to the left second primary mandibular molar in a 7-year-old child (the largest one seen in the left side of the mandible). Additionally, the radiographic and histologic findings of the lesion are described in details. 相似文献
78.
79.
Sodium channel blocking activity was measured in a series of newly synthesized tertiary amine compounds and their quaternary derivatives applied externally on internally in the rat sensory neuron. The large difference in effectiveness of the quaternary compounds on external and or internal application became smaller and even disappeared with increasing lipophilicity of the compounds. No such difference was observed in the tertiary analogs. It was concluded that lipophilicity played an important role in determining the channel blocking activity of externally applied quaternary compounds. The results suggest that, in addition to the neutral form, highly lipophilic amine local anesthetics may penetrate into and/or pass across the neuronal membrane probably as electroneutral ion pair complexes consisting of the cationic form and an appropriate anion. The present results support our hypothesis which stresses, in addition to dissociability, the role of lipophilicity of amine local anesthetics in the pH dependence of their effect. 相似文献
80.