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   15623篇
  免费   848篇
  国内免费   83篇
耳鼻咽喉   187篇
儿科学   270篇
妇产科学   190篇
基础医学   2057篇
口腔科学   491篇
临床医学   1035篇
内科学   4055篇
皮肤病学   231篇
神经病学   1037篇
特种医学   794篇
外科学   2616篇
综合类   84篇
一般理论   1篇
预防医学   496篇
眼科学   320篇
药学   975篇
中国医学   36篇
肿瘤学   1679篇
  2023年   144篇
  2022年   264篇
  2021年   429篇
  2020年   225篇
  2019年   288篇
  2018年   362篇
  2017年   305篇
  2016年   361篇
  2015年   374篇
  2014年   460篇
  2013年   505篇
  2012年   841篇
  2011年   943篇
  2010年   480篇
  2009年   470篇
  2008年   782篇
  2007年   776篇
  2006年   732篇
  2005年   726篇
  2004年   666篇
  2003年   683篇
  2002年   647篇
  2001年   446篇
  2000年   482篇
  1999年   429篇
  1998年   157篇
  1997年   148篇
  1996年   115篇
  1995年   91篇
  1994年   91篇
  1993年   94篇
  1992年   327篇
  1991年   308篇
  1990年   259篇
  1989年   247篇
  1988年   235篇
  1987年   212篇
  1986年   180篇
  1985年   161篇
  1984年   129篇
  1983年   113篇
  1979年   67篇
  1978年   53篇
  1977年   55篇
  1975年   61篇
  1973年   48篇
  1972年   57篇
  1970年   48篇
  1968年   61篇
  1967年   64篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
3.
4.
5.
A 14-year-old boy had a needle accidentally inserted through his chest wall. Chest X-ray showed a needle-shaped metallic density localized in the cardiac silhouette. An echocardiography indicated the needle had passed through the interventricular septum, and its eye and point had reached the right and left ventricle, respectively. Surgical removal of the needle was performed. The needle could not be observed from the heart surface, and was recognized in a dent 5 mm on the right side from the left anterior descending branch (LAD). The needle was easily removed under extracorporeal circulation, and he was discharged ten days after the operation.  相似文献   
6.
The effects of FUT-187 (6-amidino-2-naphthyl 4-[(4,5-dihydro-1H-imidazol-2-yl)amino]benzoate dimethanesulfonate, CAS 103926-82-5), a novel synthetic protease inhibitor, were examined in experimental rat and canine models of pancreatitis. 1. FUT-187 significantly increased the survival of rats with trypsin- and phospholipase A2-induced pancreatitis in a dose-dependent manner (10-100 mg/kg, p.o.). 2. FUT-187 decreased plasma enzymatic activity reflecting the degree of pancreatitis in rats with ethionine-induced pancreatitis, and showed a tendency to ameliorate histopathological changes in the pancreas (10-100 mg/kg p.o.). 3. FUT-187 (10 mg/kg) produced an obvious improvement of various biochemical parameters of pancreatitis and also reduced histopathological changes in the pancreas in animals with experimental pancreatitis produced by the closed duodenal loop method. In addition, FUT-187 significantly increased the survival of dogs when given by direct administration into the lumen of the closed duodenal loop. The therapeutic effects of FUT-187 in experimental pancreatitis were nearly equal in most instances to those of camostat mesilate. Thus, FUT-187 would appear to be an effective new agent for the treatment of pancreatitis.  相似文献   
7.
We report on a Thai family with dominantly inherited malformation syndrome with upper limb anomalies, short stature, quadricuspid aortic valve, and minor craniofacial anomalies. The affected individuals comprised a mildly affected mother, a moderately affected daughter, and a most severely affected son. The daughter and son had short stature. The craniofacial abnormalities comprised frontal bossing, hypoplastic nasal bones, depressed nasal bridge, and broad nasal alae. The upper limb defects varies among the patients, ranging from radial ray defects in the mother through radial and ulnar ray defects with unilateral humeral hypoplasia in the daughter to radial ray defects with severe oligodactyly and bilateral humeral hypoplasia in the son. All patients in this family had hypoplasia of the shoulder girdle and resembled what is observed in many families with Holt‐Oram syndrome. Moreover, the son showed quadricuspid aortic valve with mild aortic regurgitation. However, the present family did not show any mutation of the TBX5 gene, a disease‐causing gene of Holt‐Oram syndrome. The present family deserves further investigation on other genes that play a role in the development of the upper limbs, particularly of radial rays. © 2002 Wiley‐Liss, Inc.  相似文献   
8.
9.
10.
We report 51- and 43-year-old Japanese female patients with systemic lupus erythematosus (SLE) associated with subarachnoid hemorrhage (SAH) due to rupture of intracranial saccular aneurysms. We also review the literature of Japanese SLE patients with SAH. SAH in Japanese SLE patients is more frequent than in patients from Western countries, has different features from the general population, and can occur regardless of SLE disease activity. Clinicians must pay attention to SAH in all SLE patients.  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