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   6335篇
  免费   609篇
  国内免费   38篇
耳鼻咽喉   35篇
儿科学   313篇
妇产科学   132篇
基础医学   865篇
口腔科学   174篇
临床医学   584篇
内科学   1524篇
皮肤病学   158篇
神经病学   489篇
特种医学   346篇
外科学   934篇
综合类   83篇
预防医学   467篇
眼科学   155篇
药学   343篇
中国医学   13篇
肿瘤学   367篇
  2023年   46篇
  2022年   66篇
  2021年   158篇
  2020年   122篇
  2019年   156篇
  2018年   212篇
  2017年   194篇
  2016年   180篇
  2015年   200篇
  2014年   251篇
  2013年   322篇
  2012年   353篇
  2011年   304篇
  2010年   233篇
  2009年   254篇
  2008年   226篇
  2007年   287篇
  2006年   269篇
  2005年   264篇
  2004年   197篇
  2003年   173篇
  2002年   135篇
  2001年   135篇
  2000年   120篇
  1999年   134篇
  1998年   144篇
  1997年   123篇
  1996年   136篇
  1995年   88篇
  1994年   104篇
  1993年   61篇
  1992年   132篇
  1991年   126篇
  1990年   115篇
  1989年   122篇
  1988年   108篇
  1987年   88篇
  1986年   91篇
  1985年   71篇
  1984年   48篇
  1983年   47篇
  1982年   43篇
  1981年   25篇
  1980年   26篇
  1979年   35篇
  1978年   32篇
  1977年   26篇
  1976年   23篇
  1974年   19篇
  1969年   19篇
排序方式: 共有6982条查询结果,搜索用时 31 毫秒
1.
2.
3.
4.
We report the case of a patient with a 13-year history of pemphigus vulgaris (PV) treated with immunosuppressive agents, prednisone and mycophenolate mofetil who had developed lesions of Kaposi's sarcoma (KS) on a sole plaque of PV that had been previously treated with intralesional injections of steroids. The lesions were surgically removed and polymerase chain reaction (PCR) demonstrated human herpesvirus-8 (HHV-8) DNA. There were neither recurrences nor later dissemination of KS following gradual decrease of the immunosuppressive therapy. We suggest that the treatment with intralesional steroids may have influenced the local reactivation of a latent infection of the virus, determining the appearance of this localized KS.  相似文献   
5.
In order to assess the state and pathology of the woman's pelvis minor, a number of methods are commonly used among practitioners, encompassing clinical exploration, radiology, MRN, urodynamics, endoscopy and echography.

Echography has been poorly used in clinical pelvic exploration and its reliability is actually a matter of controversy 1. However, echographic surveys can provide us with valuable gynecological data on the state and pathologies of the soft pelvis, within the genital regions or even going beyond them, i.e. the rectal channel, bladder, urethra, anus, vascular plexuses, and all of their supporting tissues.

At our research unit, we have been employing Transvaginal Ultrasound echography (TVU) for a long time in conjunction with other pelvis-focused methods in order to study different kinds of pelvic alterations. TVU has proven to be friendly to use, fast, harmless and inexpensive, allowing serial explorations and producing high-quality dynamic images (loop-cinema, video-tape). Furthermore, this method is fairly aseptic in that the occurrence of faeces in the rectal ampolla is not a nuisance but a bonus in tracking the contours of the rectum walls and other topographical features which would be otherwise difficult to survey.

A complete pelvic floor TVU may add no longer than 5-8 minutes to a routine gynecological examination, can be implemented by the general gynecologist and generates data that can be further studied by the appropriate specialist for a more insightful evaluation 2.  相似文献   
6.
7.
8.
9.
10.
The potential antidepressant effect of flerobuterol (dl-(fluoro-2 phenyl)-1 t-butylamino-2 ethanol), a new drug related to beta-adrenoceptor agonists, was evaluated and compared with imipramine and salbutamol using classical psychopharmacological tests in mice. Like imipramine and salbutamol, flerobuterol (0.5-32 mg kg-1, ip) fully prevented apomorphine (16 mg kg-1, sc)- and partly reversed reserpine- and oxotremorine-induced hypothermia. At higher doses (16-32 mg kg-1), flerobuterol enhanced the toxic effects of yohimbine. Unlike imipramine, flerobuterol and salbutamol did not reduce immobility duration in the behavioural despair test. Salbutamol and flerobuterol decreased locomotor activity. Flerobuterol did not induce mydriasis, did not prevent oxotremorine-induced tremors or salivary and lacrimal gland secretion and did not reduce reserpine-induced palpebral ptosis. Propranolol (8 mg kg-1, ip) but not alpha-methyl-paratyrosine (75 mg kg-1, ip) prevented the flerobuterol-induced antagonism of apomorphine-induced hypothermia. Our results suggest that flerobuterol demonstrates potential antidepressant activity, which could be related to beta-adrenoceptor activation in mice.  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