全文获取类型
收费全文 | 80984篇 |
免费 | 41709篇 |
国内免费 | 14篇 |
专业分类
耳鼻咽喉 | 1549篇 |
儿科学 | 4434篇 |
妇产科学 | 742篇 |
基础医学 | 16267篇 |
口腔科学 | 5219篇 |
临床医学 | 12736篇 |
内科学 | 23704篇 |
皮肤病学 | 7513篇 |
神经病学 | 13609篇 |
特种医学 | 2414篇 |
外国民族医学 | 1篇 |
外科学 | 14312篇 |
综合类 | 96篇 |
一般理论 | 30篇 |
预防医学 | 4512篇 |
眼科学 | 1330篇 |
药学 | 5913篇 |
中国医学 | 1011篇 |
肿瘤学 | 7315篇 |
出版年
2023年 | 39篇 |
2022年 | 67篇 |
2021年 | 1333篇 |
2020年 | 5084篇 |
2019年 | 10866篇 |
2018年 | 10123篇 |
2017年 | 11473篇 |
2016年 | 12144篇 |
2015年 | 11986篇 |
2014年 | 11921篇 |
2013年 | 12416篇 |
2012年 | 4242篇 |
2011年 | 4135篇 |
2010年 | 9028篇 |
2009年 | 5375篇 |
2008年 | 2196篇 |
2007年 | 1021篇 |
2006年 | 1083篇 |
2005年 | 886篇 |
2004年 | 849篇 |
2003年 | 899篇 |
2002年 | 963篇 |
2001年 | 937篇 |
2000年 | 863篇 |
1999年 | 428篇 |
1998年 | 118篇 |
1997年 | 103篇 |
1996年 | 97篇 |
1995年 | 86篇 |
1994年 | 65篇 |
1993年 | 58篇 |
1992年 | 108篇 |
1991年 | 99篇 |
1990年 | 111篇 |
1989年 | 116篇 |
1988年 | 106篇 |
1987年 | 95篇 |
1986年 | 103篇 |
1985年 | 115篇 |
1984年 | 78篇 |
1983年 | 74篇 |
1981年 | 46篇 |
1979年 | 64篇 |
1978年 | 52篇 |
1977年 | 43篇 |
1974年 | 65篇 |
1973年 | 49篇 |
1972年 | 45篇 |
1967年 | 38篇 |
1966年 | 44篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
51.
Kyung‐Sub Moon Shin Jung Jae‐Hyuk Lee Tae‐Young Jung In‐Young Kim Soo‐Han Kim Sam‐Suk Kang 《Neuropathology》2006,26(2):141-146
We present a case of benign osteoblastoma of the occipital bone. Benign osteoblastoma is an uncommon primary bone tumor, which usually involves the vertebrae and the long bones. This tumor rarely develops in the calvaria, showing a preference for the temporal and frontal bones when it does. To the best of our knowledge, this case is only the eighth reported case of benign osteoblastoma confined to the occipital bone. A 20‐year‐old male presented with a mild tender mass lesion of the occipital area, just below the lambda. Plain X‐ray films and CT scans demonstrated an osteolytic mass surrounded by the sclerotic rim within the diploic space. MRI proved to be effective for the evaluation of the intracranial and intraosseous extensions of the tumor. However, it was very difficult to formulate a differential diagnosis against other osteoblastic tumors, or osteoid osteoma, in view of its radiological appearance. The final diagnosis was obtained by careful consideration of the histopathological characteristics of the tumor combined with its clinical and radiological features. Although generally regarded as benign, a complete resection is preferred over conventional curettage as this can guard against possible recurrence and malignant transformation. 相似文献
52.
The present paper deals with a developing training element in cognitive behaviour therapy (CBT), the self‐practice of therapeutic techniques and the self‐exploration of the person of the therapist. Initially, the current status of this training element in CBT is discussed, and a short note on its terminology is presented. Then an overview of the most important objectives of self‐practice and self‐reflection in CBT, and the concepts and methods of practice of this element is given. The concepts focus on two major aims, the self‐exploration of the person of the therapist within and beyond his or her therapeutic practice, and the self‐application of therapeutic techniques (= self‐practice). In the second part of the paper empirical studies related to the outcome of self‐reflection and self‐practice on the development of the therapist and her or his therapeutic practice are reviewed. The few empirical studies show that trainees experience in their own view substantial professional and personal gains from this training tool, with the professional impact being more important than the personal one. The most important outcomes evaluated by subjective data from the trainees are improvements in self‐insight and self‐awareness and a better understanding of the therapist's role and the therapeutic change process. Additionally, a better understanding of CBT methods and of general therapeutic skills, such as empathy and role‐taking‐competencies, are reported by the trainees. The paper comes to the conclusion that self‐exploration and self‐practice are important components of CBT training. Consequences and recommendations for its integration into training courses for CBT are discussed as well as the necessity for more research in this area. Copyright © 2002 John Wiley & Sons, Ltd. 相似文献
53.
54.
Antonio Z Gimeno‐García Adolfo Parra‐Blanco David Nicols‐Prez Cipriano Manzano‐Sanz Rafael Mndez‐Medina Enrique Quintero 《Digestive endoscopy》2006,18(2):144-146
Gastric mucormycosis involvement is a rare condition that usually occurs in inmunocompromised patients and frequently has a fatal outcome. We report the case of a 73‐year‐old woman admitted to the intensive care unit with severe bleeding after an acute pulmonary disease. Upper endoscopy disclosed wide and deep necrotic ulcers in the body and fundus of the stomach and greenish exudates with the antrum and the duodenum undamaged. Autopsy revealed an invasive mucormycosis and a severe atheromatosis. Several predisposing factors for mucormycosis infection have been reported until now. We postulate that ischemic gastritis could be a predisposing factor for colonization of zygomycete. 相似文献
55.
56.
Severe Malnutrition Associated with α-Heavy Chain Disease: Response to Tetracycline and Intensive Nutritional Support 总被引:1,自引:0,他引:1
S. J. D. O'Keefe M.D. M.Sc M.R.C.P. T. A. Winter M.B. Ch.B. K. A. Newton F.C.P. J. M. Ogden B.Sc G. O. Young Ph.D. S. K. Price M.R.C.Path. 《The American journal of gastroenterology》1988,83(9):995-1001
A 20-yr-old black male was admitted with a 5-month history of profound weight loss and diarrhea. Appetite and dietary intake had been remarkably well preserved up until the week before admission. The severity of his depletion was evidenced by a body weight of only 38% of standard, multiple electrolyte deficiencies, and reduced metabolic expenditure, protein turnover, protein synthesis, and pancreatic function. Immunological defects included diminished lymphocyte numbers, lymphocyte transformation, gamma-globulin concentration, and cell-mediated immunity. A diagnosis of alpha-heavy chain disease (alpha-HCD) was made on endoscopic duodenal biopsy and serology--lymphoma being excluded by scanning and laparotomy. Treatment consisted initially of intravenous nutrition (because of the extreme malnutrition, severe diarrhea, and malabsorption of fluid, electrolytes, carbohydrates, and fat) and oral tetracycline. Response was dramatic, with a doubling of body weight within 6 wk, and resolution of malabsorption. He was discharged on a normal diet and long-term oral tetracycline (250 mg/day), and at 1-yr follow-up, nutritional status and gut function were normal despite persistence of duodenal mucosal abnormalities and markers of alpha-HCD and bacterial overgrowth. These results suggest that the malabsorption initially identified in this patient was not due simply to the mucosal abnormalities that characterize alpha-HCD, but was more a consequence of the superimposition of nutrient maldigestion and absorption resulting from the extreme state of protein deficiency and its effects on gut and pancreatic function. 相似文献
57.
Shaun E. Cowman Joseph R. Ferrari Matthew Liao‐Troth 《Journal of community psychology》2004,32(2):121-126
This study examined the relationship between psychological sense of community, social‐support networks, and care‐giver stress and satisfaction among firefighters. No significant gender differences were obtained, but zero‐order correlates demonstrated significant relationships among all four variables. In examining the mediating effects of social‐support satisfaction, partial mediation for psychological sense of community on care‐giver satisfaction was determined, as well as full mediation for psychological sense of community on care‐giver stress. Therefore, firefighters who are satisfied with the support they receive may experience less stress with their care giving than those who experience low levels of support satisfaction. Future studies should assess these relationships more extensively in other areas of civic responsibility among public‐service employees to delineate effective support avenues. © 2004 Wiley Periodicals, Inc. J Comm Psychol 32: 121–126, 2004. 相似文献
58.
K. K. Adamama‐Moraitou G. D. Brellou T. S. Rallis N. Zavros D. Pardali A. Dinopoulos I. Vlemmas 《Transboundary and Emerging Diseases》2006,53(2):81-84
A 3.5‐year‐old intact male American Pit Bull was presented because of urinary incontinence and dysuria. Constipation, followed by diarrhoea, ocular disturbances and finally regurgitation developed over the next 4 years. Autonomic dysfunction was evidenced by clinical presentation, as well as positive ophthalmic pilocarpine test and subnormal Schirmer tear test. Diagnosis, however, was established through histopathological and immunohistochemical examination. Lesions attributable to inflammatory degenerative neuropathy of the autonomic ganglia, which represents one of the various types of human autonomic failure, were detected. 相似文献
59.
T. W. Boesgaard S. I. Castella G. Andersen A. Albrechtsen T. Spars K. Borch‐Johnsen T. Jrgensen T. Hansen O. Pedersen 《Diabetic medicine》2007,24(7):702-706
AIMS: The glutamate decarboxylase gene (GAD2) encodes GAD65, an enzyme catalysing the production of the gamma-aminobutyric acid (GABA) which interacts with neuropeptide Y to stimulate food intake. It has been suggested that in pancreatic islets, GABA serves as a functional regulator of pancreatic hormone release. Conflicting results have been reported concerning the potential impact of GAD2 variation on estimates of energy metabolism. The aim of this study was to elucidate potential associations between the GAD2-243A-->G polymorphism and levels of body mass index (BMI) and estimates of glycaemia. METHODS: Using high-throughput chip-based matrix-assisted laser desorption/ionization time-of-flight mass spectrometry, the GAD2-243A-->G (rs2236418) polymorphism was genotyped in a population-based sample (Inter99) of 5857 middle-aged, unrelated Danish White subjects. RESULTS: The G-allele was associated with modestly lower BMI (P = 0.01). In a case-control study of obesity, the G-allele frequency in 2582 participants with BMI < 25 kg/m2 was 19.5% (18.4-20.6) compared with 17.1% (15.5-18.8) in 968 participants having BMI > or = 30 kg/m2 (P = 0.03), odds ratio 0.9 (0.7-1.0). Of the 5857 subjects, GG carriers had lower fasting plasma glucose levels (mmol/l) [AA (n = 3859) 5.6 +/- 0.8; AG (n = 1792) 5.5 +/- 0.8; GG (n = 206) 5.5 +/- 0.8, P = 0.008] and lower 30-min oral glucose tolerance test (OGTT)-related plasma glucose levels (AA 8.7 +/- 1.9; AG 8.6 +/- 1.9; GG 8.6 +/- 2.0, P = 0.04), adjusted for sex, age and BMI. Analysing subjects who were both normoglycaemic and glucose tolerant (n = 4431) GG carriers still had lower fasting plasma glucose concentrations: AA (n = 2895) 5.3 +/- 0.4; AG (n = 1383) 5.3 +/- 0.4; GG (n = 153) 5.2 +/- 0.4 (P = 9.10(-5)). CONCLUSION: The present study suggests that the GAD2-243A-->G polymorphism in a population of middle-aged White people associates with a modest reduction in BMI and fasting and OGTT-related plasma glucose levels. 相似文献
60.