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   3005篇
  免费   252篇
  国内免费   24篇
耳鼻咽喉   31篇
儿科学   175篇
妇产科学   130篇
基础医学   250篇
口腔科学   56篇
临床医学   418篇
内科学   541篇
皮肤病学   75篇
神经病学   139篇
特种医学   163篇
外科学   422篇
综合类   195篇
一般理论   1篇
预防医学   242篇
眼科学   24篇
药学   209篇
  1篇
中国医学   75篇
肿瘤学   134篇
  2021年   28篇
  2020年   19篇
  2019年   25篇
  2018年   38篇
  2017年   31篇
  2016年   28篇
  2015年   43篇
  2014年   74篇
  2013年   79篇
  2012年   99篇
  2011年   107篇
  2010年   86篇
  2009年   71篇
  2008年   100篇
  2007年   103篇
  2006年   111篇
  2005年   97篇
  2004年   75篇
  2003年   71篇
  2002年   77篇
  2001年   71篇
  2000年   68篇
  1999年   74篇
  1998年   64篇
  1997年   74篇
  1996年   70篇
  1995年   75篇
  1994年   78篇
  1993年   64篇
  1992年   64篇
  1991年   56篇
  1990年   43篇
  1989年   64篇
  1988年   60篇
  1987年   57篇
  1986年   57篇
  1985年   39篇
  1984年   33篇
  1983年   30篇
  1982年   24篇
  1981年   33篇
  1980年   24篇
  1974年   24篇
  1970年   19篇
  1959年   35篇
  1958年   59篇
  1957年   87篇
  1956年   46篇
  1955年   75篇
  1954年   68篇
排序方式: 共有3281条查询结果,搜索用时 265 毫秒
1.
2.
3.
宫腹腔镜联合手术诊治不孕症150例分析   总被引:14,自引:0,他引:14  
目的:探讨宫腹腔镜联合手术在诊治不孕症中的应用。方法:对150例不孕症患者行宫腹腔镜联合手术,对不孕症病因进行诊断,同时行治疗。结果:盆腔粘连和输卵管阻塞是不孕症的主要原因。子宫内膜息肉和正常盆腔占次要比例。子宫内膜异位症和多囊卵巢也是主要病因。150例同时行宫腹腔镜输卵管通液和各种疾病的治疗。联合手术后妊娠率为48.8%。结论:腹腔镜联合手术,在一次麻醉下,可以对不孕的原因全面评价和明确诊断,在诊断同时进行治疗,对不孕症的诊断和治疗有重大的意义,值得推广。  相似文献   
4.
. Neutrophil-mediated tissue damage has been implicated in the pathogenesis of diarrhoea-associated haemolytic uraemic syndrome (D+ HUS). This study evaluates priming and activation of the neutrophil oxidative burst in D+ HUS using chemiluminescent techniques. Peripheral blood neutrophils from 11 children with acute D+ HUS were examined. No difference was found in the oxidative burst of neutrophils from patients and controls. Serum elastase levels were measured in 8 patients and found to be significantly elevated. Although elastase results suggest neutrophil activation, chemiluminescence studies do not confirm this in the peripheral blood neutrophil. This does not support a significant role for circulating agents in priming and activating the peripheral blood neutrophil. Received August 17, 1995; received in revised form and accepted November 27, 1995  相似文献   
5.
OBJECTIVE: Conventional surgical management of prolapsing haemorrhoids is by excisional haemorrhoidectomy. Postoperative pain has restricted the application of such procedures in the day case setting. These operations remain associated with a period of restricted activity. The use of circular stapling devices as an alternative to the excisional approach in the management of haemorrhoids has been described. This study reports our experience of stapled haemorrhoidopexy as a day case procedure. METHODS: Patients with third or fourth degree haemorrhoids were eligible for the procedure. Patients were considered suitable candidates for day case surgery based on conventional parameters. Symptoms were assessed using a previously validated symptom severity rating score. Stapled haemorrhoidopexy was carried out using a circular stapling device. Pain scores were obtained prior to discharge. Patients were admitted if pain was uncontrolled despite oral analgesia. Symptoms were re-scored at six-week follow-up. RESULTS: Over a 70-month period 168 consecutive stapled haemorrhoidopexies were performed or directly supervised by one consultant colorectal surgeon. One hundred and ten (65%) patients were considered appropriate candidates for day case surgery by conventional criteria. Ninety-six (87.3%) patients successfully underwent stapled haemorrhoidopexy on a day case basis. Fourteen (12.7%) patients required admission on the day of surgery (5 for early postoperative bleeding, 4 for pain necessitating continuing opiate analgesia, two for urinary retention and three for surgery performed late in the day). Six (5%) patients were re-admitted postoperatively; four for pain relief and two because of urinary retention. Of the day case patients, 91 (82.7%) and 56 (50.9%) had been seen for 6 week and 6 month review, respectively, at the time of analysis. Symptom scores were 6 (pre-operatively) vs 0 (postoperatively) (P < 0.01). 76/91 (83.5%) patients reviewed at 6/52 were asymptomatic. CONCLUSION: Stapled haemorrhoidopexy is a safe and effective procedure that can be carried out on selected patients on a day case basis. Complications are of a similar nature to excisional haemorrhoidectomy.  相似文献   
6.
7.
8.
9.
The frequency of hydatid disease in Iraq is as follows: (a) Man 1 in 319, hospital in-patients. (b) Dog 17.83 per cent. (c) Sheep and goats 11.93 per cent. (d) Cattle 24.66 per cent.  相似文献   
10.
A case of life-threatening respiratory distress during a Caesarean section under spinal anaesthesia is reported. Possible causes of the event including anaphylactoid reactions and the methods of their diagnosis are discussed. The most likely cause of the episode was felt to be an anaphylactoid reaction to Syntocinon.  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