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   178127篇
  免费   33661篇
  国内免费   2621篇
耳鼻咽喉   5400篇
儿科学   6020篇
妇产科学   2622篇
基础医学   6618篇
口腔科学   1961篇
临床医学   28316篇
内科学   55007篇
皮肤病学   7912篇
神经病学   16828篇
特种医学   7595篇
外科学   45701篇
综合类   340篇
现状与发展   72篇
预防医学   7655篇
眼科学   3989篇
药学   2871篇
中国医学   55篇
肿瘤学   15447篇
  2024年   696篇
  2023年   4972篇
  2022年   1576篇
  2021年   3728篇
  2020年   6329篇
  2019年   2666篇
  2018年   8023篇
  2017年   7827篇
  2016年   9085篇
  2015年   9076篇
  2014年   16404篇
  2013年   16690篇
  2012年   7234篇
  2011年   7477篇
  2010年   11426篇
  2009年   15141篇
  2008年   7536篇
  2007年   6006篇
  2006年   8490篇
  2005年   5781篇
  2004年   5006篇
  2003年   3866篇
  2002年   3991篇
  2001年   4075篇
  2000年   3216篇
  1999年   3512篇
  1998年   4072篇
  1997年   3853篇
  1996年   3708篇
  1995年   3485篇
  1994年   2200篇
  1993年   1811篇
  1992年   1539篇
  1991年   1545篇
  1990年   1175篇
  1989年   1277篇
  1988年   1110篇
  1987年   911篇
  1986年   951篇
  1985年   779篇
  1984年   622篇
  1983年   578篇
  1982年   582篇
  1981年   464篇
  1980年   406篇
  1979年   339篇
  1978年   361篇
  1977年   442篇
  1975年   299篇
  1972年   317篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
The aim of this study was to evaluate whether the lesion regression rate (ΔLR) based on the Response Evaluation Criteria in Solid Tumors (RECIST) criteria could be used for the prediction of treatment outcome in head and neck squamous cell carcinoma (HNSCC) patients treated with chemoradiotherapy (CRT) compared with FDG PET-CT. A total of 33 patients underwent MRI and PET-CT at pretreatment and at 8 weeks after CRT. We assessed the treatment outcome by analyzing the following parameters: the RECIST criteria, ΔLR, the European Organization for Research and Treatment of Cancer (EORTC) criteria, and pretreatment SUVmax of the primary tumor and node. The correlation between the analysis of the parameters and the results of the long-term follow-up of the patients was determined. The RECIST did not significantly correlate with locoregional control (LRC) or survival. The ΔLR was significantly lower for the lesions with locoregional failure (LRF) than for those with LRC. A threshold ΔLR of 48% revealed a sensitivity of 72.7% and specificity of 77.3% for the prediction of LRF. Progression-free survival (PFS) of patients with ΔLR ≥ 48% was significantly better than that of patients with ΔLR < 48% (P = 0.001), but not overall survival. There was a significant correlation between LRC and the EORTC (P = 0.02). The patients who achieved a complete response by the EORTC criteria showed significantly better PFS and overall survival (P = 0.01 and 0.04, respectively). The ΔLR was inferior to FDG PET-CT with respect to the prediction of patient survival; however, it may be useful for selecting patients in need of more aggressive monitoring after CRT.  相似文献   
92.
93.
Gorlin syndrome (naevoid basal cell carcinoma syndrome) is a genetically linked disorder characterized by the development of multiple basal cell carcinomas (BCCs) throughout life. Cumulative surgery, cryotherapy and other conventional interventions can result in significant disfigurement by middle age. Radiotherapy is contra-indicated because the mutated gene underlying the syndrome, ‘PTCH’, increases sensitivity to ionising radiation, so there is significant likelihood of inducing further tumours in and around the irradiated area. Photodynamic therapy offers a non-invasive treatment option for patients with this condition, with the added advantage of causing minimal scarring.  相似文献   
94.
95.
96.
97.
98.
Although psychoanalysis was the first-choice treatment for premature ejaculation (PE) between 1920 and 1960, hardly any reports on its efficacy have been published. Moreover, a scientific debate about its findings has never been fully developed. The recent progress that has been made in the classification of three different PE syndromes creates a new opportunity for psychoanalytic investigations of men with complaints of PE, distinguished by the actual duration of their intravaginal ejaculation latency time (IELT). The term premature-like ejaculatory dysfunction has been introduced to distinguish men with self-perceived PE at normal and long IELT durations from those men with lifelong, acquired and normal variable PE. Psychoanalytic research may contribute to a better understanding of the consequences of objective early ejaculations on the unconscious mental life of men with the four forms of PE. By integrating neurobiological, clinical and epidemiological data of ejaculatory performance, a revival of psychoanalytic research of PE in the four distinct, classified PE groups, will probably contribute to a deeper insight in to the unconscious mental life of men affected by PE.  相似文献   
99.
100.
Fibromyalgia is a syndrome of widespread pain, nonrestorative sleep, disturbed mood, and fatigue. Optimal treatment involves a multidisciplinary approach with a team of health care providers using pharmacologic and nonpharmacologic treatment. Because of the heterogeneity of the illness, management should be individualized for the patient. Pharmacologic treatment should address issues of pain control, sleep disturbance, fatigue, and any underlying coexisting mood disorder. Nonpharmacologic treatment should include patient education, a regular exercise and stretching program, and cognitive behavioral therapy. All of these are essential to improving functional capacity and quality of life. This review provides general guidelines in initiating a successful pharmacologic treatment program for patients with fibromyalgia.  相似文献   
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