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   11606篇
  免费   712篇
  国内免费   27篇
耳鼻咽喉   96篇
儿科学   221篇
妇产科学   217篇
基础医学   1549篇
口腔科学   247篇
临床医学   1494篇
内科学   2131篇
皮肤病学   73篇
神经病学   1082篇
特种医学   376篇
外科学   1512篇
综合类   126篇
一般理论   12篇
预防医学   1358篇
眼科学   218篇
药学   932篇
中国医学   13篇
肿瘤学   688篇
  2023年   78篇
  2022年   95篇
  2021年   211篇
  2020年   159篇
  2019年   219篇
  2018年   284篇
  2017年   203篇
  2016年   212篇
  2015年   272篇
  2014年   372篇
  2013年   546篇
  2012年   873篇
  2011年   925篇
  2010年   504篇
  2009年   510篇
  2008年   833篇
  2007年   866篇
  2006年   865篇
  2005年   871篇
  2004年   866篇
  2003年   743篇
  2002年   725篇
  2001年   90篇
  2000年   72篇
  1999年   94篇
  1998年   138篇
  1997年   121篇
  1996年   83篇
  1995年   63篇
  1994年   56篇
  1993年   53篇
  1992年   33篇
  1991年   22篇
  1990年   26篇
  1989年   28篇
  1988年   18篇
  1987年   22篇
  1986年   19篇
  1985年   23篇
  1984年   20篇
  1983年   23篇
  1982年   19篇
  1981年   21篇
  1980年   16篇
  1979年   4篇
  1978年   10篇
  1977年   8篇
  1976年   10篇
  1975年   5篇
  1972年   3篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
11.
12.
Some nonprofit mental health organizations are buying real estate in order to own service delivery sites and to provide housing for clients. Owning real estate generally requires long-term financing to conserve cash. This article explores tax exempt financing methods available to nonprofit mental health organizations.  相似文献   
13.
14.
Mental health centers and other government sponsored service organizations need highly effective management techniques. In this era of tightening budgets, the Japanese Management System may be a way of increasing both excellence and employee satisfaction. Managers who choose to explore this system may need a concise, written model as a guide to the ingenious, extensive, and paradoxical Japanese Management System. The System centers around quality control circles—autonomous problem-solving groups that strive for excellence. Composed of hierarchically interlocking groups, it uses a wide selection of group cohesion techniques to inspire esprit de corps, and an interlocking set of rewards governs behavior at every level. Decision making is collective (although supervisors retain veto power), and execution of ideas, once agreed upon, is quick and consistent. The System operates holistically, enthusiastically, with a high degree of excellence and mutual concern.  相似文献   
15.
16.
H. Steve White  PhD 《Headache》2005,45(S1):S48-S56
Topiramate is a neuromodulatory compound with stabilizing properties that was initially introduced for the management of partial seizures. Topiramate has been demonstrated to modify several receptor-gated and voltage-sensitive ion channels, including voltage-activated Na+ and Ca2+ channels and non-NMDA receptors. These receptors have been implicated in the pathophysiology of both epilepsy and migraine. The pharmacological mechanisms of action for topiramate that may explain its antiepileptic and migraine preventive activities will be discussed in this review. In addition, the potential relationship between the molecular activities of topiramate and its efficacy in epilepsy and migraine prevention will be emphasized.  相似文献   
17.
Parkinson's disease is a neurodegenerative movement disorder that results from progressive loss of midbrain dopamine neurons, which consequently leads to hyperactivity of subthalamic neurons.  相似文献   
18.
A device called the Dex Frame has recently been marketed as an aid for children with specific learning difficulties. Using a test of reading speed and a test of reading accuracy we have attempted to evaluate the device. Two groups of children with learning difficulties were used, one having sole use of the device and being allowed to carry it with them and a second group who only used the device when attending for remedial tuition and assessment. The results show that no significant improvement occurred in reading performance of the groups with learning difficulties using the Dex Frame as compared with a control group. The teachers of the groups did, however, feel that on an individual basis some children (< 10%) expressed that they felt more comfortable using the device.  相似文献   
19.
Eighteen patients with chronic constipation were diagnosed as having paradoxical puborectalis contraction (PPC) as the cause for their constipation. The diagnosis of PPC was made after office evaluation, colonic transit study, manometry, cinedefecography, and electromyography (EMG). These 18 patients had a mean duration of symptoms of 26.9 years; none of these patients had unassisted bowel movements. Fourteen patients had a mean of 4.6 laxative-induced bowel evacuations per week, and 11 patients had a mean of 4.4 enema-induced bowel evacuations per week. Patients underwent a mean of 8.9 one-hour EMG-based biofeedback sessions. At a mean follow-up of 9.1 (range, 0.5–12) months, these 18 patients had a mean of 7.3 unassisted bowel actions per week ( P <0.0001). In addition, persistent laxative use was reported by only two patients, and, in both cases, this was once a week or less ( P <0.001). Similarly, enema use was reported by only three patients, one once weekly and the other two thrice weekly ( P <0.002). No biofeedback-related complications were identified. EMG-based biofeedback is a valuable technique associated with an 89 percent success rate in the treatment of PPC.Read at the meeting of The American Society of Colon and Rectal Surgeons, Boston, Massachusetts, May 12 to 17, 1991.  相似文献   
20.
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