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   152004篇
  免费   31043篇
  国内免费   2393篇
耳鼻咽喉   5169篇
儿科学   5432篇
妇产科学   2565篇
基础医学   3276篇
口腔科学   1537篇
临床医学   26728篇
内科学   47554篇
皮肤病学   7446篇
神经病学   14972篇
特种医学   6350篇
外科学   40933篇
综合类   238篇
现状与发展   72篇
一般理论   2篇
预防医学   7093篇
眼科学   3342篇
药学   983篇
中国医学   9篇
肿瘤学   11739篇
  2024年   687篇
  2023年   4798篇
  2022年   1212篇
  2021年   3156篇
  2020年   6038篇
  2019年   2227篇
  2018年   7451篇
  2017年   7376篇
  2016年   8452篇
  2015年   8425篇
  2014年   15529篇
  2013年   15666篇
  2012年   5548篇
  2011年   5526篇
  2010年   10371篇
  2009年   14261篇
  2008年   5828篇
  2007年   4035篇
  2006年   6527篇
  2005年   3799篇
  2004年   3064篇
  2003年   2005篇
  2002年   2098篇
  2001年   3785篇
  2000年   3005篇
  1999年   3201篇
  1998年   3653篇
  1997年   3463篇
  1996年   3368篇
  1995年   3209篇
  1994年   1943篇
  1993年   1577篇
  1992年   1372篇
  1991年   1415篇
  1990年   1059篇
  1989年   1180篇
  1988年   1024篇
  1987年   857篇
  1986年   895篇
  1985年   719篇
  1984年   545篇
  1983年   529篇
  1982年   515篇
  1981年   405篇
  1980年   360篇
  1979年   309篇
  1978年   333篇
  1977年   398篇
  1975年   285篇
  1972年   303篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
82.
83.
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   
84.
85.
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   
86.
87.
88.
89.
90.
BACKGROUND AND PURPOSE: Dot-like low intensity spots (dot-like hemosiderin spots: dotHSs) on gradient echo T2*-weighted MRI have been histologically diagnosed to represent old cerebral microbleeds associated with microangiopathies. They have also been correlated to the fragility of small vessels and the tendency to bleed. Therefore, a substantial number of dotHSs might be associated with a large-sized, deep intracerebral hematoma (ICH). On the other hand, dotHSs may reflect old microbleeds that did not enlarge to symptomatic size. METHODS: To investigate how dotHSs are related to the size (maximal diameter) of primary deep ICH, we analyzed the diameter and the number of dotHSs in 151 patients with deep ICH not associated with subarachnoid hemorrhage or intraventricular hemorrhage (75 males and 76 females, age ranged from 37 to 90 [65.7 +/- 11.3 years old] who were consecutively admitted to Hakodate Municipal Hospital. The hazard ratio (HR) for a maximal diameter of deep ICH < or =2 cm was estimated, using the number of dotHSs and risk factors for stroke. RESULTS: The number of dotHSs associated with the diameter < or =2 cm was 9.2 +/- 11.5, significantly larger than that with the diameter > or =2 cm (4.7 +/- 7.0, P= .012). Multivariate analysis revealed that a maximal diameter of deep ICH of < or =2 cm was found in patients with dotHS (HR, 3.7; 95% confidence interval [CI], 1.4-10.1; P= .009). CONCLUSION: Though small sample size limited the power of our analyses, these findings suggest that the number of dotHSs may be associated with a small diameter of deep ICH.  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