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   76919篇
  免费   4807篇
  国内免费   396篇
耳鼻咽喉   889篇
儿科学   1540篇
妇产科学   1669篇
基础医学   9979篇
口腔科学   2522篇
临床医学   6921篇
内科学   17907篇
皮肤病学   1519篇
神经病学   7262篇
特种医学   3067篇
外国民族医学   2篇
外科学   12814篇
综合类   592篇
一般理论   83篇
预防医学   4222篇
眼科学   1369篇
药学   4405篇
中国医学   194篇
肿瘤学   5166篇
  2023年   640篇
  2022年   1334篇
  2021年   2513篇
  2020年   1467篇
  2019年   1973篇
  2018年   2333篇
  2017年   1596篇
  2016年   1892篇
  2015年   2179篇
  2014年   2970篇
  2013年   3660篇
  2012年   5816篇
  2011年   5926篇
  2010年   3347篇
  2009年   2968篇
  2008年   4849篇
  2007年   4954篇
  2006年   4584篇
  2005年   4411篇
  2004年   4016篇
  2003年   3581篇
  2002年   3299篇
  2001年   704篇
  2000年   629篇
  1999年   699篇
  1998年   669篇
  1997年   528篇
  1996年   437篇
  1995年   391篇
  1994年   340篇
  1993年   303篇
  1992年   456篇
  1991年   421篇
  1990年   375篇
  1989年   339篇
  1988年   326篇
  1987年   292篇
  1986年   284篇
  1985年   302篇
  1984年   300篇
  1983年   258篇
  1982年   239篇
  1981年   203篇
  1980年   194篇
  1979年   206篇
  1978年   176篇
  1977年   166篇
  1976年   156篇
  1974年   158篇
  1973年   143篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
21.
22.
We present a case of Bernard Soulier syndrome in a 9-year-old boy caused by a novel genetic mutation. This child was shown to be homozygous for a single nucleotide deletion (c.1077delG) in the GP1BA gene not previously reported. Clinically, the boy has become refractory to platelet transfusions with both allo-antibodies and iso-antibodies and a massive transfusion requirement for ongoing haemorrhage. We describe the critical role that the blood product transfusion continues to play in the management of Bernard Soulier syndrome and discuss therapeutic options in these patients.  相似文献   
23.
24.
25.
Familial Sneddon's syndrome   总被引:4,自引:0,他引:4  
We report the familial occurrence and apparent autosomal dominant inheritance of Sneddon's syndrome with variable clinical expression. The proband, a 40-year-old woman, presented with livedo reticularis and progressive neurological deterioration following a stroke. The diagnosis was confirmed by cerebral angiogram and skin biopsy, both showing the characteristic findings. Two of the patient's sisters were reported to have been similarly affected in the past. Her mother, two additional siblings and five of her seven children exhibited various vasospastic skin phenomena. Familial aggregation of this disorder may be common and a genetic basis may be involved in its pathogenesis.  相似文献   
26.
A case of actinomycotic brain infection in a juvenile patient is described. Cases of actinomycosis affecting the head and neck are rare, particularly in juvenile patients. In this case complete resolution of the infection was achieved by means of surgical treatment and prolonged antibiotic therapy. The authors emphasize the importance of a combined approach for treatment of this unusual brain infection and stress the difficulties involved in the diagnosis of this pathology. Received: 3 November 1997  相似文献   
27.
28.
We have reviewed the incidence of cisplatin-induced anaemia in patients affected with solid tumours treated with at least three courses of first-line cisplatincontaining regimens. In our experience, a low percentage (5%) of patients required transfusions of red blood cells. We think it is of the utmost importance to adopt uniform criteria in monitoring and treatment of patients at risk of developing cisplatin anaemia and to identify subsets of patients to eventually treat with erythropoietin.  相似文献   
29.
The epsilon-sarcoglycan gene (SGCE) on human chromosome 7q21 has been reported to be a major locus for inherited myoclonus-dystonia. Linkage to the SGCE locus has been detected in the majority of families tested, and mutations in the coding region have been found recently in families with autosomal dominant myoclonus-dystonia. To evaluate the relevance of SGCE in myoclonus-dystonia, we sequenced the entire coding region of the epsilon-sarcoglycan gene in 16 patients with either sporadic or familial myoclonus-dystonia. No mutations were found. This study suggests that epsilon-sarcoglycan does not play an important role in sporadic myoclonus-dystonia and supports genetic heterogeneity in familial cases.  相似文献   
30.
One of the causes of implant failures in cemented implant-retained prostheses is the fracture of abutment screw or UCLA abutment. This article reports a case of simultaneous fracture of two UCLA abutments screws occurring in an implant-supported prosthesis placed in the mandibular molar region. The fractured structures were examined under scanning electron microscopy to investigate the probable causes of the failure, which were not related to failures on materials or fabrication of the screws, but rather were due to shear forces. The misfit in cemented prostheses may be the most likely cause of shear force generation.  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