全文获取类型
收费全文 | 106412篇 |
免费 | 7328篇 |
国内免费 | 1840篇 |
专业分类
耳鼻咽喉 | 903篇 |
儿科学 | 2683篇 |
妇产科学 | 1524篇 |
基础医学 | 4925篇 |
口腔科学 | 4834篇 |
临床医学 | 9256篇 |
内科学 | 15705篇 |
皮肤病学 | 1933篇 |
神经病学 | 5888篇 |
特种医学 | 2617篇 |
外国民族医学 | 21篇 |
外科学 | 11378篇 |
综合类 | 17509篇 |
现状与发展 | 8篇 |
一般理论 | 5篇 |
预防医学 | 7109篇 |
眼科学 | 1690篇 |
药学 | 9389篇 |
171篇 | |
中国医学 | 11751篇 |
肿瘤学 | 6281篇 |
出版年
2024年 | 356篇 |
2023年 | 1515篇 |
2022年 | 2766篇 |
2021年 | 4055篇 |
2020年 | 4087篇 |
2019年 | 5465篇 |
2018年 | 4679篇 |
2017年 | 4172篇 |
2016年 | 3479篇 |
2015年 | 3237篇 |
2014年 | 6733篇 |
2013年 | 8704篇 |
2012年 | 6568篇 |
2011年 | 6683篇 |
2010年 | 5665篇 |
2009年 | 4844篇 |
2008年 | 4209篇 |
2007年 | 4428篇 |
2006年 | 3956篇 |
2005年 | 3351篇 |
2004年 | 2751篇 |
2003年 | 2425篇 |
2002年 | 2019篇 |
2001年 | 1657篇 |
2000年 | 1391篇 |
1999年 | 1075篇 |
1998年 | 886篇 |
1997年 | 802篇 |
1996年 | 656篇 |
1995年 | 609篇 |
1994年 | 556篇 |
1993年 | 457篇 |
1992年 | 377篇 |
1991年 | 338篇 |
1990年 | 246篇 |
1989年 | 256篇 |
1988年 | 236篇 |
1985年 | 852篇 |
1984年 | 1213篇 |
1983年 | 915篇 |
1982年 | 949篇 |
1981年 | 903篇 |
1980年 | 824篇 |
1979年 | 804篇 |
1978年 | 680篇 |
1977年 | 469篇 |
1976年 | 567篇 |
1975年 | 456篇 |
1974年 | 429篇 |
1973年 | 356篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
71.
目的:提高原发性输尿管癌的术前诊断水平。方法:对南京医科大学第一附属医院1989-2002年间收治的31例原发性输尿管癌的临床资料进行回顾性分析。结果:31例中,肉眼血尿22例(71.0%),腰痛11例(35,5%)。B超、静脉肾盂造影(IVU)、CT和逆行造影检查的阳性率分别为输尿管腔内占位4例(13.0%)、输尿管腔内占位3例(11.5%)、膀胱或合并膀胱占位8例(36.4%),输尿管充盈缺损6例(40.0%)。29例患者经手术治疗,其中13例行患侧肾、输尿管、膀胱袖状切除。结论:老年患者反复发作的腰痛及血尿应考虑原发性输尿管癌的可能,造影诊断对本病有较高价值,应作CT及MRU无创检查。 相似文献
72.
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
73.
A. Compston 《Acta neurologica Scandinavica》2006,113(S183):41-47
Contemporary licensed treatments for multiple sclerosis fail to provide a solution for the disease because their effects are limited to a modest reduction in the frequency of new episodes. They do not reduce disability or materially influence the progressive phase of the disease. A contemporary strategy for management requires a more detailed analysis of the separate contributions to the clinical features and overall course made by inflammation, axonal injury, compensatory mechanisms, and remyelination. From this formulation emerges the need either for early and fully effective suppression of the inflammatory response, limiting the damage to all components of the axon-glial unit; or the development of strategies for axonal and myelin repair that solve the issues of controlled differentiation, delivery and timing of these cell and growth factor-based interventions. 相似文献
74.
贺光照 《重庆医科大学学报》1992,(2)
本文根据34例电击伤临床资料,分析早期处理与病人全身情况、局部损伤愈合以及并发症的关系.并讨论间生态组织的处理原则.结果表明:伤后1天内与伤后3天以上就诊的病人比较,前者全身情况良好,创面感染率低,局部损伤用皮瓣或(和)皮片覆盖效果满意,并发症及截肢率均较低 相似文献
75.
76.
Taco Pilot 《Journal of clinical periodontology》1986,13(10):889-893
Abstract Economic factors in diagnosis and treatment planning in periodontology may be considered from several points of view. A first perspective is that of government responsibility. Because of the explosion in health care expenditure in the last decade, public funding of dental care programmes may become static or even reduced. Most governments try to curb the ever growing public health expenditure. Consequently, terms like effectiveness, efficiency and accountability are now becoming common words also in relation to periodontal health care. Moreover, private insurance companies, which have entered this area, may be individual patient who, explicitly or implicitly, would like to consider the services individual patient, who explicitly or implicitly, would like to consider the sendees rendered in periodontal therapy and prevention as cost-effective. Features of supply of and demand for care on an individual basis should also be considered. Finally, the periodontist or general practitioner has to consider economic factors. In professional life, there should be a balance between good working conditions providing satisfactory care, and the demands and priorities of individual patients and the community at large. 相似文献
77.
G. Mumcu T. Ergun Y. Elbir E. Eksioglu-Demiralp S. Yavuz T. Atalay H. Direskeneli 《Journal of oral pathology & medicine》2005,34(1):13-16
Background: The aim of this study was to evaluate the effects of azithromycin on mucocutaneous manifestations, oral health and immune response in Behçet's disease (BD). Methods: Eight BD patients with active mucocutaneous symptoms were treated with azithromycin for 4 weeks. Oral health, clinical manifestations and in vitro interleukin (IL)‐12, interferon (IFN)‐γ, IL‐10 and monocyte chemotactic protein (MCP)‐1 responses were evaluated before and after treatment. Results: The number of folliculitic lesions, healing time of oral ulcers and scores of plaque indexes (PLIs) were lower after azithromycin treatment (P < 0.05). Scores of PLIs correlated positively with the healing time of oral ulcers (P = 0.02). Although a trend towards increased stimulated IL‐10 responses with azithromycin was observed, no statistically significant difference was found. Stimulated and unstimulated MCP‐1, IFN‐γ and IL‐12 responses were similar before and after treatment (P > 0.05). Conclusion: Azithromycin was observed to be effective in decreasing folliculitic lesions and fastening the healing time of oral ulcers in BD. 相似文献
78.
Richard Lehman Frederick Andermann ré Olivier Prakash N. Tandon Luis F. Quesney Theodore B. Rasmussen 《Epilepsia》1994,35(6):1117-1124
Summary: It is not generally appreciated that intractable seizures involving the face area are amenable to surgical treatment. Twenty patients with onset of sensorimotor seizures in the face area of the pre- and postcentral gyri have been studied and surgically treated since 1948. Seizures started in the face, tongue, or throat, followed by diverse patterns depending on spread of seizure activity. Two patients had epilepsia partialis continua; 6 had either tonic or atonic drop attacks. All patients had pre- and postcentral face area resections, 12 in the dominant hemisphere. In addition, 3 had more extensive postcentral removal, 7 had temporal lobe, and 4 had small separate or contiguous frontal or parietal resection. Because the seizures were not sufficiently reduced by the first operation, 6 required reoperation; 4 of these patients had residual epileptiform activity on electrocorticogram (ECoG) after the first resection. Three patients had new neurologic signs that did not return to the preoperative level, but in 2 of them the deficit related mainly to higher resection in the central area. All but 2 of these 20 patients had at least moderate seizure reduction. Corticectomy can be performed for treatment of seizures arising in the lower central area and usually does not lead to significant permanent neurologic deficit. 相似文献
79.
Jerry Z. Finklestein Mark D. Krailo Carl Lenarsky Stephen Ladisch Geoffrey K. Blair C. Patrick Reynolds Anneliese L. Sitarz G. Denman Hammond 《Pediatric blood & cancer》1992,20(4):307-311
The Childrens Cancer Study Group evaluated daily oral 13-cis-retinoic acid to determine its therapeutic efficacy in 28 children with advanced neuroblastoma refractory to conventional therapy. Cheilitis and fissured lips were the most common side effects; however, fewer than 50% of the patients experienced any toxicity. Two of twenty-two evaluable children demonstrated positive response to therapy. In one case, a child received the drug for 11 months. Seventeen patients demonstrated progressive disease within 28 days of the start of treatment. Three other patients with stable disease, or removed from study at day 28, were considered nonresponsive. Our data demonstrate that, when given as a single daily oral dose of 100 mg/m2, 13-cis-retinoic acid does not have significant activity in children with advanced neuroblastoma. © 1992 Wiley-Liss, Inc. 相似文献
80.
Stenosis of the tracheostome is an occasional complication following laryngectomy. Having tried a number of procedures recommended for correction of such stenoses with limited results, we developed a new technique. This technique which is based on multiple Y-V plasties has been applied to 20 patients. Measurements of the stomal area following surgery in 18 patients showed an average increase in stomal size by a factor of 3.8. One patient apparently had no increase of the stoma. In 2, no post-operative measurements were available. Post-operative infection resulted in recurrence of the stenosis in one patient. He was successfully reoperated using the same technique. Follow-up revealed that none of the patients had complaints related to their stoma. 相似文献