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   132137篇
  免费   8163篇
  国内免费   1611篇
耳鼻咽喉   1667篇
儿科学   3471篇
妇产科学   4473篇
基础医学   20186篇
口腔科学   3781篇
临床医学   10971篇
内科学   24070篇
皮肤病学   2705篇
神经病学   9314篇
特种医学   4308篇
外国民族医学   3篇
外科学   18430篇
综合类   5414篇
一般理论   60篇
预防医学   10216篇
眼科学   2980篇
药学   10982篇
中国医学   850篇
肿瘤学   8030篇
  2021年   1217篇
  2019年   1323篇
  2018年   1956篇
  2017年   1374篇
  2016年   1454篇
  2015年   1705篇
  2014年   2301篇
  2013年   3073篇
  2012年   4513篇
  2011年   4672篇
  2010年   2800篇
  2009年   2567篇
  2008年   4238篇
  2007年   4557篇
  2006年   4427篇
  2005年   4067篇
  2004年   3799篇
  2003年   3581篇
  2002年   3336篇
  2001年   6883篇
  2000年   7055篇
  1999年   5849篇
  1998年   1970篇
  1997年   1523篇
  1996年   1066篇
  1995年   974篇
  1992年   3835篇
  1991年   3903篇
  1990年   3632篇
  1989年   3642篇
  1988年   3506篇
  1987年   3353篇
  1986年   3157篇
  1985年   3062篇
  1984年   2115篇
  1983年   1865篇
  1982年   1067篇
  1979年   1955篇
  1978年   1258篇
  1977年   1047篇
  1976年   955篇
  1975年   1229篇
  1974年   1390篇
  1973年   1447篇
  1972年   1386篇
  1971年   1272篇
  1970年   1164篇
  1969年   1139篇
  1968年   1036篇
  1967年   906篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
101.
We report the case of a patient infected with human immunodeficiency virus who presented with fever and a disseminated papulous eruption, diagnosed as cutaneous miliary tuberculosis. The diagnosis was made by histological examination of a skin biopsy, which showed numerous acid‐fast bacilli. A culture grown from a skin biopsy isolated a resistant Mycobacterium tuberculosis strain. The papules disappeared within a few days after starting treatment with pyrazinamide, isoniazid and moxifloxacin.  相似文献   
102.
A mutant form of ammodytoxin A, a neurotoxic phospholipase A2 from the venom of the long nosed viper Vipera ammodytes ammodytes, was prepared by site-directed mutagenesis, conjugated to a nanogold particle and inoculated into the antero-lateral aspect of one hind limb of female mice. Eight hours later the mice were killed, the soleus muscles of both ipsi- and contra-lateral hind limbs were removed, exposed to a silver enhancing medium and then prepared for transmission electron microscopy. Silver-enhanced particles were subsequently found concentrated in the peri-synaptic area, particularly within the synaptic gutter and the deep synaptic folds, and in many cases had been taken up into the cytoplasm of the terminal boutons of the motor axon. The results suggest that the presynaptic neurotoxicity of snake venom phospholipases A2 involves several components of the neuromuscular apparatus, including intracellular organelles of the motor nerve terminal.  相似文献   
103.
104.
A spectrophotometric method has been developed for measurements of myeloperoxidase activity in phagocytes, and conditions of measurements specified. Contribution of mononuclear cells to myeloperoxidase activity was found negligible, the major role here was played by neutrophils and eosinophils. Myeloperoxidase activity was found reduced in the patients with chronic granulomatous disease, agammaglobulinemia, and elevated in hyper-IgE-syndrome; this parameter was unchanged in ataxia telangiectasia and chronic dermatomucosal candidiasis.  相似文献   
105.
106.
107.
Experience in the treatment of 30 cases with gas gangrene from war wounds   总被引:1,自引:0,他引:1  
Z Y Li  X L Wang  X S Wang 《中华外科杂志》1986,24(10):580-1, 637
  相似文献   
108.
109.
110.
Most of the papers published on spigelian hernia are either case reports or small retrospective series. In this prospective multicenter study, we aimed to outline the specific features of spigelian hernias and patients’ characteristics more clearly. Surgeons enrolled patients to be entered into the database as they diagnosed and treated the hernias at will. The baseline and surgical outcome parameters were noted in each patient. A painful mass was the main presenting complaint in half of 34 patients. Accurate preoperative diagnosis was possible in 31 patients. Open intraperitoneal mesh repair was the preferred technique. The mean hospital stay and time until return to normal daily activities were 4.1 and 15.6 days. Although a rare condition, diagnosis of a spigelian hernia is not difficult once remembered. Its surgical repair seems to cause few complications and is very well tolerated by the patient.  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