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   3761篇
  免费   172篇
  国内免费   45篇
耳鼻咽喉   96篇
儿科学   60篇
妇产科学   87篇
基础医学   377篇
口腔科学   59篇
临床医学   317篇
内科学   1153篇
皮肤病学   89篇
神经病学   250篇
特种医学   191篇
外科学   637篇
综合类   12篇
一般理论   1篇
预防医学   75篇
眼科学   57篇
药学   180篇
中国医学   3篇
肿瘤学   334篇
  2023年   25篇
  2022年   54篇
  2021年   70篇
  2020年   49篇
  2019年   67篇
  2018年   95篇
  2017年   79篇
  2016年   86篇
  2015年   92篇
  2014年   127篇
  2013年   177篇
  2012年   254篇
  2011年   255篇
  2010年   142篇
  2009年   166篇
  2008年   294篇
  2007年   301篇
  2006年   255篇
  2005年   227篇
  2004年   237篇
  2003年   155篇
  2002年   180篇
  2001年   56篇
  2000年   41篇
  1999年   47篇
  1998年   43篇
  1997年   28篇
  1996年   35篇
  1995年   24篇
  1994年   24篇
  1993年   24篇
  1992年   33篇
  1991年   28篇
  1990年   25篇
  1989年   16篇
  1988年   19篇
  1987年   11篇
  1986年   8篇
  1985年   8篇
  1984年   18篇
  1983年   7篇
  1982年   13篇
  1981年   13篇
  1980年   6篇
  1979年   6篇
  1978年   8篇
  1976年   4篇
  1974年   3篇
  1973年   5篇
  1969年   4篇
排序方式: 共有3978条查询结果,搜索用时 0 毫秒
81.

Background

Development and widespread use of laparoscopic bariatric surgery exposes emergency room physicians and general surgeons to face acute or chronic surgical complications of bariatric surgery.

Methods

The most common surgical emergencies after bariatric surgery are examined based on an extensive review of bariatric surgery literature and on the personal experience of the authors' practice in four high-volume bariatric surgery centers.

Results

An orderly stepwise approach to the bariatric patient with an emergency condition is advisable. Resuscitation should follow the same protocol adopted for the non-bariatric patients. Consultation with the bariatric surgeon should be obtained early, and referral to the bariatric center should be considered whenever possible. The identification of the surgical procedure to which the patient was submitted will orient in the diagnosis of the acute condition. Procedure-specific complication should always be taken into consideration in the differential diagnosis. Acute slippage is the most frequent complication that needs emergency treatment in a laparoscopic gastric banding. Sleeve gastrectomy and gastric bypasses may present with life-threatening suture leaks or suture line bleeding. Gastric greater curvature plication (investigational restrictive procedure) can present early complications related to prolonged postoperative vomiting. Both gastric bypass and bilio-pancreatic diversion may cause anastomotic marginal ulcer, bleeding, or rarely perforation and severe stenosis, while small bowel obstruction due to internal hernia represents a surgical emergency, also caused by trocar site hernia, intussusceptions, adhesions, strictures, kinking, or blood clots. Rapid weight loss after bariatric surgery can cause cholecystitis or choledocholithiasis, which are difficult to treat after bypass procedures.

Conclusions

The general surgeon should be informed about modern bariatric procedures, their potential acute complications, and emergency management.  相似文献   
82.
We report the case of B.A., an 11-year-old child with a nonverbal (visuospatial) learning disability (NLD). Detailed psychometric and neuropsychological assessment on visuospatial working memory (VSWM) revealed specific simultaneous-spatial working memory impairment. A treatment targeting simultaneous-spatial working memory was given to B.A. for seven sessions (over one month); this resulted in improvement of simultaneous-spatial working memory, with the benefit that the training was maintained after six months.

Discussion of clinical and theoretical implications is given, taking account of the distinctions that can be made between the different components of visuospatial working memory and different subtypes of NLD, thus allowing the tailoring of specific training to target the impaired VSWM component.  相似文献   
83.
84.
85.
The aim of the study is to demonstrate the successful use of “Hour 1” transfer of sperm microinjected oocytes in natural cycles of poor responder women. Seventy women were selected from 92 consecutive poor responders undergoing intracytoplasmatic sperm injection (ICSI) in a natural cycle at our Sterility and Assisted Reproduction Unit from September 2009 to July 2013, and randomly distributed in two homogeneous groups: Group A or B. Women in Group A (35) underwent transfer within 1 h after ICSI; Group B (35, control group) underwent transfer 3 days after ICSI. In Group A, seven clinical pregnancy and one miscarriage occurred; in Group B, eight clinical pregnancies and two miscarriages were observed. Pregnancy, miscarriage, term pregnancy and overall live birth rates’ difference between the two groups was not statistically significant (p?>?0.05). Difference between the two groups in terms of timing, type of delivery and newborn birthweight was not observed. Neither ectopic pregnancy nor multiple pregnancies occurred. “Hour 1” uterine transfer of ICSI oocytes, still to be considered with caution because of the relatively low number of observations of the pilot study, deserves further attention on a larger scale, and might be evaluated for clinical and financial effectiveness in other clinical settings.  相似文献   
86.
87.
88.
89.
90.
The aim of this work was to test the effects of the Function Generator Bite (FGB) on the masticatory muscles of temporomandibular joint dysfunction (TMD) subjects. Two groups were selected for the study. A group of 20 TMD patients (group F) requiring orthodontic treatment and treated with FGB and a group of 10 healthy subjects (group H) were considered. Both groups were evaluated before the therapy began (TO) and then after 18 months of therapy (T1). An electromyographic analysis of the masseter and temporalis anterior muscles and a clinical evaluation according to the Research Diagnostic Criteria for TMD (RDC/TMD) were performed. A statistical difference between the two groups was observed at TO with respect to the activity index. TMD subjects showed a lower value of the index. Further studies are necessary to fully understand the utility of this EMG index as a diagnostic indicator.  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