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   60755篇
  免费   5274篇
  国内免费   4162篇
耳鼻咽喉   519篇
儿科学   806篇
妇产科学   1067篇
基础医学   7733篇
口腔科学   972篇
临床医学   7857篇
内科学   9496篇
皮肤病学   709篇
神经病学   3615篇
特种医学   2286篇
外国民族医学   52篇
外科学   6147篇
综合类   8092篇
现状与发展   19篇
一般理论   3篇
预防医学   4071篇
眼科学   1672篇
药学   6455篇
  62篇
中国医学   3009篇
肿瘤学   5549篇
  2024年   172篇
  2023年   929篇
  2022年   2365篇
  2021年   3108篇
  2020年   2238篇
  2019年   2127篇
  2018年   2228篇
  2017年   1874篇
  2016年   1878篇
  2015年   2689篇
  2014年   3325篇
  2013年   2817篇
  2012年   4422篇
  2011年   4900篇
  2010年   2956篇
  2009年   2255篇
  2008年   3118篇
  2007年   3245篇
  2006年   3160篇
  2005年   3138篇
  2004年   2132篇
  2003年   2067篇
  2002年   1784篇
  2001年   1262篇
  2000年   1321篇
  1999年   1415篇
  1998年   946篇
  1997年   904篇
  1996年   692篇
  1995年   620篇
  1994年   523篇
  1993年   347篇
  1992年   425篇
  1991年   385篇
  1990年   335篇
  1989年   296篇
  1988年   296篇
  1987年   241篇
  1986年   234篇
  1985年   184篇
  1984年   127篇
  1983年   100篇
  1982年   54篇
  1981年   54篇
  1980年   42篇
  1979年   98篇
  1978年   43篇
  1975年   40篇
  1974年   52篇
  1973年   30篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
Gangliosides take part in synaptic transmission, neuronal metabolism and development of nervous tissue. They cooperate with nerve growth factor (NGF) and have positive influence on regeneration of the nervous system impairments. There exist many behavioural and biochemical evidences of gangliosides participation in the regeneration of experimentally injured animal nervous system. The therapeutic effectivity of gangliosides in clinical practice is encouraging. Commercial preparates of gangliosides (Cronassial, Sygen) have been successfully used in the therapy of chronic neuropathies, strokes and subarachnoidal haemorrhages. Among the adverse reactions to these drugs are: local irritation, anxiety and possible detrimental effect in immunological system. Ganglioside preparations need further clinical examinations.  相似文献   
52.
失血性休克复苏及监测指标研究进展   总被引:9,自引:1,他引:8  
创伤、失血性休克是一古老的临床研究课题。不仅在平时常见,更重要的是与战伤救治密切相关。尽管近10年来取得了一些进展,但复苏时机、复苏目标、液体种类的选择、复苏后继续生命支持以及监测技术等仍是临床以及研究人员面临的重大挑战。本文将就近年来有关上述问题的最新研究进展进行分析和讨论,以期提高对该复杂综合征的认识,为今后的研究提供帮助。  相似文献   
53.
We have examined the effects of auranofin and some nonsteroidal anti-inflammatory drugs (NSAID) on the release of gelatinase from rat neutrophils. Two preparations of neutrophils were used, one derived from normal blood and the other from the inflamed pleural fluids of carrageenin-elicited pleurisy. Both neutrophil preparations released gelatinase in response to stimulation by serum-treated zymosan (STZ) or concanavalin A (Con A). Control, blood-derived neutrophils exposed to STZ produced more than a four-fold increase in the release of gelatinase, a response significantly inhibited by the presence of auranofin at 10(-5) and 10(-4) M. Inflamed, pleural neutrophils exposed to STZ produced a doubling in gelatinase release and this was also inhibited by auranofin at 10(-5) and 10(-4) M. The release of gelatinase by control neutrophils (no stimulation) or by neutrophils exposed to Con A was enhanced by 10(-6) M auranofin. In contrast, the NSAIDs aspirin, piroxicam, sulindac, indomethacin and naproxen had no inhibitory action on neutrophil gelatinase release. We conclude that auranofin is an effective inhibitor of gelatinase release from neutrophils and this property may represent a contributory factor assigned to the beneficial therapeutic action of gold salts.  相似文献   
54.
外伤性先兆性视网膜脱离的治疗   总被引:1,自引:0,他引:1  
  相似文献   
55.
对205例甲状腺手术进行分析,其发病情况与资料报道基本相符。各种并发症的发生率未超过1%,无手术死亡,术后无甲状腺危象发生,与60年代以前相比已大为降低。  相似文献   
56.
57.
58.
Intravaginal misoprostol has been shown to be effective forcervical priming before a surgically induced abortion. The objectivewas to investigate the effectiveness of oral misoprostol incervical dilatation prior to vacuum aspiration between the 6thand 12th weeks of pregnancy. The results showed that in nulliparouspatients, the median cervical dilatation in the treatment group(7.8 mm) was significantly greater than that in the placebogroup (3.7 mm). In multiparous patients, the difference wasalso statistically significant (9.8 versus 6.0 mm). The easeof dilatation, assessed subjectively by the operating surgeons,was significantly improved in the treatment group. There wasalso a significant reduction in the duration of the operationand in the mean blood loss in the treatment group. The side-effectsencountered in the treatment group were mild and well acceptedby the women. Oral misoprostol is an effective and safe methodfor cervical dilatation prior to vacuum aspiration in firsttrimester pregnancy.  相似文献   
59.
60.
Fifty-four kinds of crude drug derived from insects are listed in the "herbal" Jing-shi-zheng-lei-da-guang-ben-cao (1108 A.D.) edited during the Chinese Song dynasty (960-1280 A.D.). We considered each of them from the viewpoint of various herbals and have commented on them, the order being adhered to in most cases. We added our own findings of identification of insect crude drugs available on the market. The crude drugs emphasized are mantis egg case, wasp's nest, scarab larva, red cicada, snipe fly, horse fly, flying cockroach, Eupolyphaga, Chinese Cantharides and scarab beetle. Others are discussed to a lesser extent.  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