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   39006篇
  免费   2157篇
  国内免费   59篇
耳鼻咽喉   386篇
儿科学   1175篇
妇产科学   835篇
基础医学   6003篇
口腔科学   291篇
临床医学   3572篇
内科学   9279篇
皮肤病学   882篇
神经病学   3726篇
特种医学   1149篇
外国民族医学   31篇
外科学   4747篇
综合类   82篇
一般理论   6篇
预防医学   2780篇
眼科学   617篇
药学   2635篇
中国医学   76篇
肿瘤学   2950篇
  2023年   208篇
  2022年   164篇
  2021年   572篇
  2020年   338篇
  2019年   629篇
  2018年   1107篇
  2017年   787篇
  2016年   749篇
  2015年   933篇
  2014年   979篇
  2013年   1547篇
  2012年   2631篇
  2011年   2589篇
  2010年   1281篇
  2009年   1023篇
  2008年   2363篇
  2007年   2419篇
  2006年   2278篇
  2005年   2366篇
  2004年   2276篇
  2003年   2082篇
  2002年   2037篇
  2001年   1090篇
  2000年   1150篇
  1999年   926篇
  1998年   206篇
  1997年   158篇
  1996年   154篇
  1995年   143篇
  1994年   124篇
  1992年   546篇
  1991年   474篇
  1990年   477篇
  1989年   444篇
  1988年   402篇
  1987年   389篇
  1986年   351篇
  1985年   329篇
  1984年   235篇
  1983年   187篇
  1982年   109篇
  1979年   163篇
  1974年   121篇
  1973年   109篇
  1972年   112篇
  1971年   118篇
  1970年   107篇
  1969年   131篇
  1968年   113篇
  1967年   104篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
12.
Gallstone shock wave therapy at the University Hospital of Zurich is a joint venture between the Medical Clinic, Medical Policlinic and Surgical Clinic. Patients with symptomatic cholecystolithiasis willing to submit themselves to a long period of treatment, were accepted for ESWL, should no contraindications be present. From October 1988 through May 1989 we treated 48 patients. In approximately two thirds of our patients we were successful with one ESWL alone, in one third 2 sessions and in two patients even 3 sessions were needed. In 42 patients course after therapy was as planned. Six had to be cholecystectomized later on. Best results were achieved in patients with single gallstones. In 2 of 5 cases there was disagreement between the number of gallstones found sonographically and the intraoperative findings. Histologic examination of gallbladders after ESWL showed no pathologic changes.  相似文献   
13.
14.
Congenital cranial dysinnervation disorders (CCDDs) are responsible for 1–2% of infant strabismus cases. Insufficient innervation and misinnervation of aberrant nerve fibres lead to motility restrictions and synkinesis. We present the most common CCDDs and explain their pathogenesis and the resulting clinical features. Furthermore, we emphasize essential diagnostic steps and treatment aspects.  相似文献   
15.
A 24-year old woman displayed a coloboma of the right optic nerve with multiple small parapapillary retinochoroidal colobomas. This rare association makes one suspect that the pathogenesis of colobomatous defects of the optic disc area are caused by a faulty closure of the embryonic fissure and an abnormal maturation of the cells of the anlage of the optic nerve head.  相似文献   
16.
The authors assess of three decades of struggle against Bancroftian filariasis in French Polynesia. Wuchereria bancrofti var. pacifica, aperiodic filaria, and Aedes polynesiensis, mosquito with high parasitologic output, set up a cycle very well adapted to the Polynesian environment; after numerous tests, the chemoprophylaxis with diethylcarbamazine (3 mg/kg/half-year) of all the exposed population has been decided, in association with methods of vector-control (use of predatory crustaceans). However, the achievement of this strategy is impeded by economical contingencies and the endemic comes up again particularly in areas close to eradication. Entomological clues show a high transmission over the greater part of French Polynesia.  相似文献   
17.
18.
PURPOSE: In France, legislation mandates that the clinical diagnosis of brain death be confirmed by one paraclinical test before organ donation is allowed. That test may be either the electroencephalogram (EEG) or cerebral angiography. We report a case in which the clinical diagnosis of brain death was first confirmed by two EEGs performed according to the French guidelines, but ruled out by cerebral angiography. Considering that the EEG is no longer recommended to establish the diagnosis of brain death, we discuss the relevance of maintaining the EEG for brain death diagnosis in France. CLINICAL FINDINGS: A 58 yr-old man was admitted to the intensive care unit because of coma secondary to a massive subarachnoid hemorrhage with herniation below the falx shown by computed tomography. Clinical criteria of brain death were rapidly present. Two EEGs first confirmed the diagnosis but a four-vessel cerebral angiography was finally performed because the patient moved spontaneously. This cerebral angiography showed flow in the right internal carotid artery. A computed tomography performed the next day definitely confirmed the absence of brain death and organ donation did not occur. CONCLUSIONS: This case demonstrates the limitations of the EEG for this indication and suggests that angiography should be preferred. French legislation is probably maladjusted and would benefit by incorporating guidelines of other countries like Canada. International harmonization of criteria for brain death diagnosis would also be welcome.  相似文献   
19.
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