全文获取类型
收费全文 | 10238篇 |
免费 | 890篇 |
国内免费 | 111篇 |
专业分类
耳鼻咽喉 | 114篇 |
儿科学 | 294篇 |
妇产科学 | 100篇 |
基础医学 | 2499篇 |
口腔科学 | 339篇 |
临床医学 | 571篇 |
内科学 | 1013篇 |
皮肤病学 | 242篇 |
神经病学 | 513篇 |
特种医学 | 326篇 |
外国民族医学 | 3篇 |
外科学 | 1948篇 |
综合类 | 518篇 |
预防医学 | 112篇 |
眼科学 | 143篇 |
药学 | 506篇 |
中国医学 | 135篇 |
肿瘤学 | 1863篇 |
出版年
2024年 | 24篇 |
2023年 | 140篇 |
2022年 | 170篇 |
2021年 | 245篇 |
2020年 | 295篇 |
2019年 | 266篇 |
2018年 | 279篇 |
2017年 | 287篇 |
2016年 | 273篇 |
2015年 | 331篇 |
2014年 | 493篇 |
2013年 | 831篇 |
2012年 | 384篇 |
2011年 | 473篇 |
2010年 | 395篇 |
2009年 | 415篇 |
2008年 | 458篇 |
2007年 | 455篇 |
2006年 | 438篇 |
2005年 | 355篇 |
2004年 | 363篇 |
2003年 | 343篇 |
2002年 | 335篇 |
2001年 | 314篇 |
2000年 | 286篇 |
1999年 | 309篇 |
1998年 | 244篇 |
1997年 | 239篇 |
1996年 | 202篇 |
1995年 | 216篇 |
1994年 | 182篇 |
1993年 | 151篇 |
1992年 | 147篇 |
1991年 | 108篇 |
1990年 | 109篇 |
1989年 | 82篇 |
1988年 | 68篇 |
1987年 | 73篇 |
1986年 | 66篇 |
1985年 | 77篇 |
1984年 | 81篇 |
1983年 | 40篇 |
1982年 | 43篇 |
1981年 | 38篇 |
1980年 | 36篇 |
1979年 | 22篇 |
1978年 | 25篇 |
1977年 | 10篇 |
1976年 | 10篇 |
1975年 | 3篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
31.
32.
Summary A retrospective study of 61 patients with glomus jugulare tumours treated at the National Hospital for Neurology and Neurosurgery, and at the Royal National Throat, Nose and Ear Hospital, London. The average age at presentation was 41.7 years. The patients were mainly treated by a posterolateral combined otoneurosurgical approach. 42/61 of the patients had total or subtotal excision of their tumours, 7/61 had partial removal and the remaining 11/61 had no operation. Only one case required a 2-staged procedure. There were two deaths in the postoperative period, one from intracerebral haemorrhage and the other from the left hemisphere infarction.Postoperative radiotherapy was given to 5/7 of the patients who had partial removal. 3/40 of the patients with total removal had postoperative radiotherapy, and a further 3/40 had received radiotherapy pre-operatively.Of the 11 patients who did not undergo surgery, 7/11 were treated with radiotherapy and 4/11 had embolisation only. 相似文献
33.
34.
35.
S. Leskinen-Kallio 《Clinical physiology and functional imaging》1994,14(3):329-335
Summary. The particular advantages of positron emission tomography (PET) technique are that it has higher sensitivity, higher resolution, and a higher quality of image than that found in conventional nuclear medicine. The possibility of quantification and the wide range of useful tracers have raised expectations of this new method. To date, most of the human PET cancer studies have been performed with [18F]fluorodeoxyglucose (FDG) or [11CJmethionine. These are good imaging agents for tumours. However, more specific radiopharmaceuticals are required if other features of tumour metabolism are to be observed, f11Thymidine may prove to be a good tracer for quantitative measurements of tumour proliferation and [18F]misonidazole has been suggested for imaging of hypoxia. 相似文献
36.
C. M. Lazaro W. Y. Guo M. Sami T. Hindmarsh K. Ericson A. L. Hulting J. Wersäll 《Neuroradiology》1994,36(2):111-114
In a group of 69 patients with pituitary tumours, 12 were found to have evidence of intratumoral haemorrhage on MRI, characterized by high signal intensity on short TR/TE sequences. This was verified in all but 1 patient. The majority of the bleedings occurred in macroadenomas. Five (42%) were prolactinomas and 4 (33%) were non-functioning adenomas. There were 2 GH- and 1 ACTH-secreting tumours. All 5 patients with prolactinomas were on bromocriptine medication. Two of the patients had a clinical picture of pituitary apoplexy. The haemorrhage was not large enough to prompt surgery in any of the patients. However, surgical verification of the diagnosis was obtained in 5 cases, while 6 patients were examined with follow-up MRI. 相似文献
37.
Yu X Kong Gavin Wright Konrad Pesudovs Justin ODay Zoe Wainer Harrison S Weisinger 《Clinical & experimental optometry》2007,90(5):336-344
Horner syndrome is an uncommon but important clinical entity, representing interruption of the sympathetic pathway to the eye and face. Horner syndrome is almost always diagnosed clinically, though pharmacological testing can be used to confirm the diagnosis. Imaging modalities such as PET, CT and MRI are important components of work‐up for patients presenting with acquired Horner syndrome. Our patient’s presentation with Horner syndrome unmasked the causative superior sulcus squamous cell carcinoma and a coincidental lower lobe adenocarcinoma. Successful radical treatment of these cancers resulted in complete resolution of the syndrome and disease‐free survival at 18 months. We review the anatomy and pathophysiology underlying this and other causes of Horner syndrome. 相似文献
38.
A series of 237 appendices was studied immunohistochemically for neurogenous hyperplasia. This was observed in 195 cases. It was possible to trace a continuum from appendices with intact lumens, featuring intramucosal neurogenous hyperplasia often with co-existent submucosal and muscular nerve growth, to obliterated specimens whose axial portions were composed of varying proportions of nerve tangles and fibrous tissue. Predominantly fibrotic specimens were considered as end-stages of this process. Stromal, argyrophilic cells lying amidst the nerve elements were prominent in the early, non-obliterated cases; their number decreased in the obliterated nerve rich specimens and such cells became inapparent in the late fibrotic stage. Repeated minimal subclinical attacks of inflammation are thought to trigger this lesion. 相似文献
39.
40.