首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2274篇
  免费   139篇
  国内免费   20篇
耳鼻咽喉   24篇
儿科学   185篇
妇产科学   14篇
基础医学   223篇
口腔科学   71篇
临床医学   199篇
内科学   611篇
皮肤病学   37篇
神经病学   123篇
特种医学   81篇
外科学   327篇
综合类   41篇
预防医学   58篇
眼科学   51篇
药学   216篇
中国医学   18篇
肿瘤学   154篇
  2023年   19篇
  2022年   25篇
  2021年   84篇
  2020年   48篇
  2019年   63篇
  2018年   83篇
  2017年   61篇
  2016年   66篇
  2015年   58篇
  2014年   101篇
  2013年   133篇
  2012年   192篇
  2011年   192篇
  2010年   91篇
  2009年   81篇
  2008年   156篇
  2007年   148篇
  2006年   139篇
  2005年   126篇
  2004年   103篇
  2003年   80篇
  2002年   69篇
  2001年   24篇
  2000年   29篇
  1999年   41篇
  1998年   16篇
  1997年   9篇
  1996年   9篇
  1995年   7篇
  1994年   5篇
  1993年   5篇
  1992年   15篇
  1991年   16篇
  1990年   11篇
  1989年   8篇
  1988年   10篇
  1987年   8篇
  1986年   9篇
  1985年   8篇
  1984年   7篇
  1983年   6篇
  1981年   5篇
  1980年   6篇
  1979年   4篇
  1978年   8篇
  1975年   8篇
  1973年   9篇
  1968年   5篇
  1967年   6篇
  1966年   3篇
排序方式: 共有2433条查询结果,搜索用时 15 毫秒
1.
2.
3.
Clinical Rheumatology - Our aim was to determine reasons for admission, the prevalence and spectrum of infections, and the outcomes in a multiethnic cohort of hospitalized systemic lupus...  相似文献   
4.
5.
Dermatofibrosarcoma protuberance of head and neck is a rare neoplasm and accounts for less than one percent of Head and Neck Neoplasm. The objective of this report is to understand etiology, presentation, histopathologic identification and treatment option for this tumour. The goal of current report is to acquaint the clinician with presentation and treatment option for this disease.  相似文献   
6.
Abstract   Dissection of the pulmonary autograft is an extremely rare complication requiring emergent treatment as there is a chance of rupture and proximal aortic involvement. The autograft dissection can involve the aortic annulus, causing separation of leaflets from the annulus in addition to causing annular dilatation, thereby precluding resuspension of leaflets. The usual treatment in such cases is to perform the Bentall procedure, which involves placing a valved conduit (usually mechanical valve) and thereby necessitating anticoagulation. This report describes a case of successful valve-sparing aortic root replacement following the Ross procedure with dissection of autograft.  相似文献   
7.
Clinical Experience with Light-Emitting Diode (LED) Photomodulation   总被引:1,自引:0,他引:1  
Background. Light-emitting diode (LED) photomodulation is a novel nonthermal technology used to modulate cellular activity with light.
Objective:. We describe our experience over the last 2 years using 590 nm LED photomodulation within a dermatologic surgery environment.
Methods. Practical use of nonthermal light energy and emerging applications in 3,500 treatments delivered to 900 patients is detailed.
Results. LED photomodulation has been used alone for skin rejuvenation in over 300 patients but has been effective in augmentation of results in 600 patients receiving concomitant nonablative thermal and vascular treatments such as intense pulsed light, pulsed dye laser, KTP and infrared lasers, radiofrequency energy, and ablative lasers.
Conclusion:. LED photomodulation reverses signs of photoaging using a new nonthermal mechanism. The anti-inflammatory component of LED in combination with the cell regulatory component helps improve the outcome of other thermal-based rejuvenation treatments.  相似文献   
8.
We evaluated 50 mothers of children with Down syndrome attending Genetic Clinic of the Institute of Child Health and Hospital for Children, Madras, with special reference to their knowledge, belief and attitudes in the care of these children. After evaluation, they were educated individually and in groups with demonstration, picture cards and pamphlets, on the causation, expected health problems, developmental potential of Down syndrome and the ways and means to help the child to attain the maximum developmental potential. They were taught on preventive aspects of Down syndrome as well. Re-evaluation was done after three months, and considerable improvement was noted in the mother's knowledge, and attitude towards bringing up such a child. The mothers also showed an improvement in the skills in providing developmental enrichment to these children. Thus this study has formulated a programme in the management of such children, which can be practised on any population, anywhere, especially, in rural areas, and by less affluent folk, with poor educational background.  相似文献   
9.
OBJECTIVE: Oligoastrocytomas (OA) are mixed gliomas with distinct oligodendroglial and astrocytic neoplastic components. Very little about OA has been reported in the intractable epilepsy population. METHODS: We undertook a retrospective review of 923 patients who underwent resective surgery for intractable epilepsy between 1996 and 2004. RESULTS: 6/923 (0.7%) patients were diagnosed with OA. Five patients were female, one was male. Median age at diagnosis was 25 years (range 19-44 years). Tumors arose from the left side in all patients and from the temporal lobe in five patients. Three patients had complex partial seizures. Median length of refractory epilepsy prior to surgery was 10.5 years (range 1-28 years), and the median number of antiepileptic drugs used was 2 (range 1-10). Preoperative WADA testing for language and memory localization was done for three patients; preoperative stereotactical localization was done for three patients. Surgical pathology revealed low-grade OA (WHO II) in five patients, and anaplastic OA in one. There were no surgical complications, clinical or radiographic tumor recurrence at a mean follow up period of 3.2 years (range 2-8). Excellent seizure freedom was achieved in 5/6 patients. CONCLUSION: As a result of our small sample size, general conclusions may be imprecise, but this review suggests that OA behave similar to other tumors related to intractable epilepsy: they usually have a preoperative seizure course of many years, an excellent rate of seizure-freedom following surgery, and are in general, low-grade tumors with an indolent course for which serial imaging is sufficient follow-up.  相似文献   
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号