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   1991篇
  免费   210篇
  国内免费   2篇
耳鼻咽喉   11篇
儿科学   41篇
妇产科学   63篇
基础医学   275篇
口腔科学   38篇
临床医学   218篇
内科学   286篇
皮肤病学   30篇
神经病学   240篇
特种医学   185篇
外科学   237篇
综合类   31篇
一般理论   4篇
预防医学   217篇
眼科学   33篇
药学   177篇
中国医学   2篇
肿瘤学   115篇
  2021年   20篇
  2019年   27篇
  2018年   34篇
  2017年   29篇
  2016年   24篇
  2015年   23篇
  2014年   42篇
  2013年   60篇
  2012年   86篇
  2011年   70篇
  2010年   42篇
  2009年   52篇
  2008年   70篇
  2007年   82篇
  2006年   68篇
  2005年   84篇
  2004年   72篇
  2003年   65篇
  2002年   62篇
  2001年   67篇
  2000年   96篇
  1999年   78篇
  1998年   38篇
  1997年   16篇
  1996年   20篇
  1995年   26篇
  1994年   19篇
  1993年   18篇
  1992年   40篇
  1991年   64篇
  1990年   39篇
  1989年   49篇
  1988年   58篇
  1987年   59篇
  1986年   33篇
  1985年   36篇
  1984年   43篇
  1983年   33篇
  1982年   25篇
  1981年   18篇
  1980年   15篇
  1979年   28篇
  1978年   20篇
  1977年   23篇
  1975年   15篇
  1974年   28篇
  1973年   18篇
  1972年   16篇
  1971年   14篇
  1967年   20篇
排序方式: 共有2203条查询结果,搜索用时 15 毫秒
1.
2.
3.
The Patient in the Family: An Ethics of Medicine and Families. By Hilde Lindemann Nelson and James Lindemann Nelson.  相似文献   
4.
In our retrospective study, we report the objective results of the Mau osteotomy in the treatment of hallux valgus. We reviewed the results of 24 cases of moderate to severe hallux valgus deformities corrected with the Mau osteotomy of the first metatarsal combined with a distal soft-tissue procedure. Follow-up was possible in 24 cases. Preoperatively the mean hallux valgus and first intermetatarsal angles were 31.3 degrees and 16.6 degrees respectively, and were corrected postoperatively to an average of 13.00 degrees+/-7.15 degrees and 9.80 degrees+/-2.43 degrees respectively (P< .001). In the sagittal plane, the first metatarsal was shortened by an average of 2.00 mm. Two (8.3%) cases had dorsal elevation of the osteotomy fragment. Complications included 3 recurrences of the deformity, 1 frank nonunion, 8 dorsal cortical nonunions, 5 cases of undercorrection, and 1 case of broken hardware that was present in the nonunion that went on to revision. There were no superficial or deep infections, and no cases of transfer metatarsalgia were noted. In this series, the use of an oblique first metatarsal osteotomy with a dorsal shelf resulted in reliable and powerful correction of the first intermetatarsal angle in patients with moderate to severe hallux valgus. Particular attention should be paid to severe IM angles and the possibility of undercorrections. Despite ambulation postoperatively, the Mau osteotomy minimized dorsal malunion and the incidence of transfer metatarsalgia. LEVEL OF CLINICAL EVIDENCE: 4.  相似文献   
5.
6.
Where treatment options are limited, the role of clinical consultation in providing information and support becomes more important. This study examines the immediate impact of medical consultation on male sub-fertility clinic attender's anxiety, depression, self-blame, information appraisal and perceptions of future fertility. Data were collected pre- and immediately post-consultation. Clinical information and consultation details were recorded. Results showed that anxiety levels were high before consultation. Following consultation anxiety and self-blame were both reduced while depression increased. Despite information about poor prognosis being given during consultation, participants remained overly optimistic about their chances of achieving a pregnancy. It appears that the consultation has a distinct psychological impact and possible mechanisms underlying this are discussed.  相似文献   
7.
We have reviewed the incidence, type and site of microbiologically proven bacterial infection occurring in 52 patients with the acquired immunodeficiency syndrome (AIDS) who presented to Southmead Hospital, Bristol between 1990 and 1994. A total of 30 (58%) patients had significant bacterial isolates. The majority of infections were community acquired. Overall, more infections were caused by Gram-negative organisms but Gram-positive organisms predominated in bacteraemia. Mycobacterium avium intracellulare (MAI) caused infection in the largest number of patients, followed by Staphylococcus aureus, Streptococcus pneumoniae, Pseudomonas sp, and Campylobacter sp. When individual episodes of infection were considered, after MAI, Haemophilus influenzae, Streptococcus pneumoniae and Pseudomonas sp were the organisms most frequently isolated; often these same organisms caused recurrent chest infection. Bacterial infections in AIDS patients are common and although they generally respond well to antimicrobial chemotherapy there is a high recurrence rate, particularly in the respiratory tract, which is the commonest site of infection.  相似文献   
8.
9.
Summary Urinary output of endogenous monoamine oxidase (MAO) inhibitory activity, was significantly raised in serial samples collected across a migraine attack compared with collections during attack-free periods and in healthy controls, which did not differ from each other. There was a highly significant correlation in output between isatin, a major fraction of the MAO inhibitory activity, and output of the MAO inhibitory activity itself. However, although there was a tendency towards increased isatin excretion during migraine attacks, it failed to reach statistical significance.  相似文献   
10.
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