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   36606篇
  免费   3710篇
  国内免费   1592篇
耳鼻咽喉   354篇
儿科学   669篇
妇产科学   551篇
基础医学   3467篇
口腔科学   710篇
临床医学   4504篇
内科学   5239篇
皮肤病学   570篇
神经病学   2080篇
特种医学   1047篇
外国民族医学   2篇
外科学   3383篇
综合类   5726篇
现状与发展   17篇
一般理论   25篇
预防医学   3672篇
眼科学   996篇
药学   4102篇
  56篇
中国医学   2459篇
肿瘤学   2279篇
  2024年   169篇
  2023年   521篇
  2022年   1419篇
  2021年   1835篇
  2020年   1500篇
  2019年   1200篇
  2018年   1340篇
  2017年   1328篇
  2016年   1184篇
  2015年   1610篇
  2014年   1924篇
  2013年   2095篇
  2012年   3130篇
  2011年   3204篇
  2010年   2323篇
  2009年   1979篇
  2008年   2457篇
  2007年   2268篇
  2006年   2021篇
  2005年   1832篇
  2004年   1349篇
  2003年   1248篇
  2002年   1019篇
  2001年   391篇
  2000年   340篇
  1999年   228篇
  1998年   253篇
  1997年   189篇
  1996年   137篇
  1995年   122篇
  1994年   127篇
  1993年   86篇
  1992年   99篇
  1991年   99篇
  1990年   78篇
  1989年   57篇
  1988年   52篇
  1987年   49篇
  1986年   61篇
  1985年   52篇
  1984年   60篇
  1983年   60篇
  1982年   71篇
  1981年   47篇
  1980年   39篇
  1979年   23篇
  1978年   32篇
  1977年   32篇
  1974年   18篇
  1973年   15篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
11.
12.
Summary: One hundred five women with a documented pregnancy of 41 weeks' gestation or more, admitted for induction of labour by balloon catheter with extra-amniotic saline instillation, were retrospectively compared to 196 women admitted in spontaneous labour at the same gestational age, with regard to mode of delivery. The success rate of the induction group was 97.1%. The mode of delivery did not differ significantly between the 2 groups. The Caesarean section rates were 11.4% in the induction group versus 9.7% in the spontaneous group. The mode of delivery after induction of labour by balloon catheter with extra-amniotic saline instillation and simultaneously commenced intravenous oxytocin infusion, in pregnancies of 41 weeks or more, is similar to that of spontaneous deliveries at the same gestational age.  相似文献   
13.
14.
15.
目的 :探讨地塞米松减轻曲马多术后镇痛时恶心呕吐的临床效果。方法 :选择术后自愿硬膜外镇痛(PCEA)的病例 6 0例 ,随机分为试验组 (地塞米松 曲马多 0 .15 %布比卡因 )和对照组 (格拉司琼 曲马多 0 .15 %布比卡因 )。结果 :两组病人术后疼痛评分 (VAS法 ) ,镇静评分及恶心呕吐的发生率无明显差异 (P >0 .0 5 )。结论 :地塞米松可以减轻曲马多术后镇痛时恶心呕吐的发生 ,效果良好 ,不增加副作用 ,价格便宜  相似文献   
16.
17.
理顺功能关系、理清业务流程是构建社区卫生服务信息系统的前提和基础,功能建模是理顺功能关系的一个重要手段。在研究现有的各种功能分析方法的基础上,本文以IDEF0模型方法为基础,提出了社区卫生服务信息系统功能建模方法。通过建立功能、数据和约束之间的内在联系,为系统的功能设计和数据分析提供了基础。  相似文献   
18.
A case of an unusual lesion from the maxilla is presented. Macroscopically, the lesion was solid and histologically consisted of 'multiple separate keratocysts' of varying size that infiltrated into the surrounding bone and soft tissues. Panoramic image and CT scans showed a multilocular honeycomb ill-defined radiolucency with infiltration into the maxillary sinus and floor of orbit. This lesion should be differentiated from similar odontogenic lesions, such as keratoameloblastoma and papilliferous keratoameloblastoma. As there was no evidence of follicles, islands of ameloblastoma, or papilliferous structures in the entire specimen, the lesion could not be diagnosed as either a keratoameloblastoma or a papilliferous keratoameloblastoma. The invasive and destructive growth behavior, the histopathological features, and the histochemical pattern of the collagen stroma imply that this solid lesion is a neoplasia. It is suggested that the proper term for this lesion is solid variant of odontogenic keratocyst.  相似文献   
19.
In summary, we have described two patients with CRMO and psoriasis, and have reviewed the musculoskeletal manifestations associated with pustular eruptions of the palms and soles. In view of the frequent occurrence of PPP in patients with CRMO, we suggest that the occurrence of psoriasis in our two patients is more than coincidence, and that noninfectious, inflammatory lesions of bone may be another musculoskeletal manifestation of psoriasis. This rare association, as well as the association of PPP with disorders associated with new bone formation, may shed new insights on the relatively common finding of periosteal elevation associated with psoriatic arthritis and the occasional severe juxta-articular osteolytic destructive bone lesions seen in psoriatic arthritis.  相似文献   
20.
Repetitive nerve stimulation (RNS) is a simple and rapid method for evaluation of neuromuscular transmission defects. Although the effect of exercise in conjunction with RNS is well recognized, it has not been standardized in actual patient and control groups. In a prospective study over a period of 1 year, the authors evaluated the effect of exercise in conjunction with RNS in comparison with conventional 3-Hz RNS at rest in the clinical setting. Fifty-four patients who were referred for possible neuromuscular transmission disorders, in addition to 35 healthy control subjects, were studied. Amplitude and area decremental responses with RNS at rest and after 20 seconds of maximal exercise at 1-minute intervals up to 3 minutes were evaluated. The use of RNS with exercise resulted in additional diagnostic yield of up to 36.4% compared with conventional 3-Hz RNS at rest. The standardized use of exercise with RNS is advocated for increasing its diagnostic yield in the neurophysiologic laboratory.  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