全文获取类型
收费全文 | 28381篇 |
免费 | 1800篇 |
国内免费 | 94篇 |
专业分类
耳鼻咽喉 | 389篇 |
儿科学 | 710篇 |
妇产科学 | 572篇 |
基础医学 | 4120篇 |
口腔科学 | 704篇 |
临床医学 | 3271篇 |
内科学 | 5811篇 |
皮肤病学 | 400篇 |
神经病学 | 2454篇 |
特种医学 | 1156篇 |
外国民族医学 | 1篇 |
外科学 | 3719篇 |
综合类 | 256篇 |
一般理论 | 54篇 |
预防医学 | 2373篇 |
眼科学 | 542篇 |
药学 | 1935篇 |
中国医学 | 30篇 |
肿瘤学 | 1778篇 |
出版年
2023年 | 143篇 |
2022年 | 240篇 |
2021年 | 494篇 |
2020年 | 305篇 |
2019年 | 538篇 |
2018年 | 621篇 |
2017年 | 474篇 |
2016年 | 538篇 |
2015年 | 617篇 |
2014年 | 845篇 |
2013年 | 1394篇 |
2012年 | 1891篇 |
2011年 | 2072篇 |
2010年 | 1149篇 |
2009年 | 1013篇 |
2008年 | 1675篇 |
2007年 | 1835篇 |
2006年 | 1666篇 |
2005年 | 1724篇 |
2004年 | 1635篇 |
2003年 | 1446篇 |
2002年 | 1527篇 |
2001年 | 238篇 |
2000年 | 172篇 |
1999年 | 254篇 |
1998年 | 377篇 |
1997年 | 310篇 |
1996年 | 276篇 |
1995年 | 252篇 |
1994年 | 237篇 |
1993年 | 198篇 |
1992年 | 143篇 |
1991年 | 130篇 |
1990年 | 115篇 |
1989年 | 131篇 |
1988年 | 117篇 |
1987年 | 104篇 |
1986年 | 94篇 |
1985年 | 125篇 |
1984年 | 138篇 |
1983年 | 121篇 |
1982年 | 192篇 |
1981年 | 146篇 |
1980年 | 151篇 |
1979年 | 79篇 |
1978年 | 97篇 |
1977年 | 89篇 |
1976年 | 79篇 |
1975年 | 65篇 |
1974年 | 83篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
41.
Johan W. de Fijter 《American journal of transplantation》2004,4(11):1754-1755
42.
43.
Summary An infant with persistent truncus arteriosus associated with splenic agenesis and the asplenia syndrome is reported, including clinical, echocardiographic and autopsy findings. To the authors' knowledge this association has not been previously reported. 相似文献
44.
Five-Year Outcome After Epilepsy Surgery in Nonmonitored and Monitored Surgical Candidates 总被引:9,自引:9,他引:0
Mark D. Holmes† Carl B. Dodrill†‡ Linda M. Ojemann †‡ George A. Ojemann†‡ 《Epilepsia》1996,37(8):748-752
Summary: Purpose : We wished to compare outcome 5 years after temporal lobectomy in 28 patients selected for surgery on the basis of interictal EEG patterns with that in 46 patients who underwent EEG-video monitoring studies as part of their preoperative evaluation during the same era.
Methods : The 28 nonmonitored patients had interictal EEG patterns that demonstrated a consistent, unilateral, anterior-midtemporal epileptiform focus, without discordant findings from other studies. Outcomes were assessed for years 4 and 5 after operation.
Results : Twenty-six of 28 (92.9%) nonmonitored patients were seizure-free or had at least 75% reduction in seizures. Twenty-nine of 46 (63.0%) monitored patients were seizure-free or had at least 75% reduction in seizures. Preoperative interictal EEGs of 29 of these patients showed independently localized bitemporal, ex-tratemporal, midposterior temporal, or diffuse epileptiform patterns. The remaining 17 monitored patients had preoperative strictly unilateral anterior-midtemporal interictal discharges, and their outcome was comparable to the nonmonitored group, with 15 (88.8%) seizure-free or with at least 75% reduction in seizures.
Conclusions : A proportion of candidates for epilepsy surgery can be selected without ictal recordings provided that interictal EEGs demonstrate consistent unilateral anterior-midtemporal epileptiform discharges and that other data are not discordant. 相似文献
Methods : The 28 nonmonitored patients had interictal EEG patterns that demonstrated a consistent, unilateral, anterior-midtemporal epileptiform focus, without discordant findings from other studies. Outcomes were assessed for years 4 and 5 after operation.
Results : Twenty-six of 28 (92.9%) nonmonitored patients were seizure-free or had at least 75% reduction in seizures. Twenty-nine of 46 (63.0%) monitored patients were seizure-free or had at least 75% reduction in seizures. Preoperative interictal EEGs of 29 of these patients showed independently localized bitemporal, ex-tratemporal, midposterior temporal, or diffuse epileptiform patterns. The remaining 17 monitored patients had preoperative strictly unilateral anterior-midtemporal interictal discharges, and their outcome was comparable to the nonmonitored group, with 15 (88.8%) seizure-free or with at least 75% reduction in seizures.
Conclusions : A proportion of candidates for epilepsy surgery can be selected without ictal recordings provided that interictal EEGs demonstrate consistent unilateral anterior-midtemporal epileptiform discharges and that other data are not discordant. 相似文献
45.
46.
Carl Mindell M.D. 《The Psychiatric quarterly》1994,65(1):31-47
This article describes aspects of the impact of shame and contempt in psychotherapy and in our daily lives. Psychotherapy
is seen as moving between the poles of shame and hope. Shame-anxiety alerts us to the imminent danger of being shamed; shame
is described as the experience of finding our individuality unacceptable and contempt is seen as a means of coping with shame
where the other is made to feel one's shame. Examples of each are provided as well as comments about psychotherapy issues
with patients who exhibit shame-anxiety, shame and contempt. Shame-anxiety, shame, contempt and tyranny are seen as points
along a spectrum of humiliation experiences.
Presented at Department of Psychiatry Grand Rounds, Albany Medical College, March 1990, and University of Natal Faculty of
Medicine (South Africa), November, 1990. 相似文献
47.
48.
Ronald D. Curran M.D. Constantine Mavroudis M.D. Carl L. Backer M.D. 《Journal of cardiac surgery》1997,12(6):372-379
A bstract Background : Ventricular-to-pulmonary artery conduits in growing patients with congenital heart disease will require replacement from time to time due to somatic growth, neointimal hyperplasia, and pulmonary artery stenosis. The purpose of this article is to review our experience with ascending aortic extension for significant long-segment pulmonary artery stenosis in patients undergoing reoperation for right ventricular-to-pulmonary artery conduit replacement. Methods : From 1989 to 1997, 8 patients had aortic transection, right pulmonary artery augmentation arterioplasty, and aortic interposition graft (Hemashield in 7 and Gore-tex in 1) in association with right ventricular-to-pulmonary artery conduit replacement in 7 patients and completion Fontan operation in 1 patient. Aortic cross-clamp time was 90 ± 34 minutes, and the cardiopulmonary bypass time was 205 ± 37 minutes. Results : All patients survived. In those 7 patients who had conduit replacement, the RV/LV ratio declined from 0.78 ± 0.15 to 0.45 ±; 0.05 postoperatively (P < 0.05). Average length of stay was 8.9 ± 7.2 days. Follow-up range is 18 months to 8 years (mean 4 years). Two complications included cardiac transplantation for pre-existing poor left ventricular function and accelerated conduit stenosis leading to conduit re-replacement. Conclusion : Ascending aortic extension facilitates long-segment pulmonary artery augmentation arterioplasty and enlarges the retroaortic space, preventing future compression restenosis. 相似文献
49.
Johan Grunewald 《The clinical respiratory journal》2007,1(2):64-73
Introduction: Sarcoidosis is a granulomatous disorder of unknown aetiology, affecting young adults and frequently involving the lungs. Objective: The aim of the present review was to give an overview of the clinical aspects in sarcoidosis. Results: The majority of patients recover, but some develop a chronic disease that may result in fibrosis and respiratory failure. Besides the lungs, peripheral lymph nodes, the skin, the liver and the eyes are commonly affected as well. The genetic background, as well as environmental factors, is of importance for developing sarcoidosis. The incidence varies in different populations, in the Nordic countries approximately with 20/100 000 new patients yearly. Sarcoidosis is diagnosed when clinical and radiological findings are supported by histological evidence in the form of non‐caseating epithelioid cell granulomas, and when other causes of these features are excluded. Patients in need of treatment are usually treated with corticosteroids, topically or as oral steroids. A clinical effect of immunomodulatory drugs blocking tumour necrosis factor (TNF)α has been suggested from several case reports, while two controlled studies showed only minor effects; however, with a tendency to a more pronounced effect on patients with a more severe disease. The immune response in sarcoidosis, with a typical accumulation of CD4+ T‐cells to the lungs, indicate the existence of specific antigens in this disease. Recently, antigens derived from infectious agents such as Mycobacteria and Proprionibacterium acnes have come into focus. Lymphocyte populations with immunoregulatory functions have recently been investigated and seem to be dysfunctional in sarcoidosis, opening the possibility of developing new treatment strategies in this disease. Conclusion: Recent technical developments have provided better tools, enabling detailed and more thorough analyses of the inflammatory process in sarcoidosis. Please cite this paper as: Grunewald J. Clinical aspects and immune reactions in sarcoidosis. The Clinical Respiratory Journal 2007; 1:64–73. 相似文献
50.
Martine Visser Johan Marinus Anne M Stiggelbout Jacobus J Van Hilten 《Movement disorders》2004,19(11):1306-1312
We developed a questionnaire to assess autonomic symptoms in patients with Parkinson's disease (PD) and evaluated its reliability and validity. Based on the results of a postal survey in 46 PD patients, 21 multiple system atrophy patients, and 8 movement disorders specialists, items were included according to their frequency, burden, and clinical relevance. The questionnaire was evaluated in 140 PD patients and 100 controls, and test-retest reliability was established in a sample of 55 PD patients. The SCOPA-AUT consists of 25 items assessing the following regions: gastrointestinal (7), urinary (6), cardiovascular (3), thermoregulatory (4), pupillomotor (1), and sexual (2 items for men and 2 items for women) dysfunction. Test-retest reliability was good. Autonomic problems increased significantly with increasing disease severity for all autonomic regions, except sexual dysfunction. We conclude that SCOPA-AUT is a reliable and valid questionnaire that evaluates autonomic dysfunction in PD. 相似文献