首页 | 官方网站   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   5739篇
  免费   367篇
  国内免费   14篇
医药卫生   6120篇
  2023年   38篇
  2022年   40篇
  2021年   192篇
  2020年   137篇
  2019年   160篇
  2018年   196篇
  2017年   116篇
  2016年   143篇
  2015年   147篇
  2014年   252篇
  2013年   285篇
  2012年   367篇
  2011年   365篇
  2010年   213篇
  2009年   180篇
  2008年   250篇
  2007年   245篇
  2006年   232篇
  2005年   225篇
  2004年   186篇
  2003年   162篇
  2002年   142篇
  2001年   142篇
  2000年   113篇
  1999年   112篇
  1998年   46篇
  1997年   32篇
  1996年   35篇
  1995年   28篇
  1994年   41篇
  1993年   35篇
  1992年   85篇
  1991年   91篇
  1990年   93篇
  1989年   77篇
  1988年   69篇
  1987年   79篇
  1986年   58篇
  1985年   61篇
  1984年   64篇
  1983年   46篇
  1982年   63篇
  1981年   72篇
  1980年   70篇
  1979年   55篇
  1978年   33篇
  1977年   26篇
  1976年   32篇
  1973年   31篇
  1970年   26篇
排序方式: 共有6120条查询结果,搜索用时 515 毫秒
1.
Microbial co-infections are another primary concern in patients with coronavirus disease 2019 (COVID-19), yet it is an untouched area among researchers. Preliminary data and systematic reviews only show the type of pathogens responsible for that, but its pathophysiology is still unknown. Studies show that these microbial co-infections are hospital-acquired/nosocomial infections, and patients admitted to intensive care units with invasive mechanical ventilation are highly susceptible to it. Patients with COVID-19 had elevated inflammatory cytokines and a weakened cell-mediated immune response, with lower CD4+ T and CD8+ T cell counts, indicating vulnerability to various co-infections. Despite this, there are only a few studies that recommend the management of co-infections.  相似文献   
2.
3.
4.
5.
Mirror movements are simultaneous, involuntary, identical movements occurring during contralateral voluntary movements. These movements are considered as soft neurologic signs seen uncommonly in clinical practice. The mirror movements are described in various neurological disorders which include parkinsonism, cranio veretebral junction anamolies, and hemiplegic cerebral palsy. These movements are intriguing and can pose significant disability. However, no such observation regarding mirror movements in progressive hemifacial atrophy have been reported previously. We are reporting a teenage girl suffering from progressive hemifacial atrophy and epilepsy with demonstrable mirror movements in hand.  相似文献   
6.
7.
8.
9.
This is a prospective, non-randomized study to evaluate and compare the results, morbidity and surgical time for endonasal carbon-dioxide laser assisted dacryocystorhinostomy and external dacryocystorhinostomy. 70 consecutive patients of chronic dacryocystitis with nasolacrimal duct obstruction were selected for the study. 36 patients under went endonasal CO2 laser assisted dacryocystorhinostomy and 34 had external dacryocystorhinostomy. Selection of the type of operation was left to the patient's choice. All the patients had preoperative counseling and both the procedures were explained in detail with their advantages and disadvantages. Patients not willing for the external incision were selected for endonasal laser assisted dacryocystorhinostomy and others were operated via external approach. Silicone tubes were put in all the patients for three months after surgery. The final follow up was 12 months after the removal of silicone tubes. The patency of the lacrimal passage was confirmed by irrigation, and patients were questioned about their symptoms. The success rates, 12 months after removal of silicone tubes were 100% in endonasal CO2 laser assisted dacryocystorhinostomy and 88.24% in external dacryocystorhinostomy. The surgical time of endonasal laser assisted dacryocystorhinostomy was 38 minutes as compared to 62 in external dacryocystorhinostomy. Complication rate in both groups was almost equal. Thus, we came to the conclusion that Endonasal CO2 laser assisted dacryocystorhinostomy is a better surgical option to external dacryocystorhinostomy in cases of chronic dacryocystitis with nasolacrimal duct obstruction, with shorter surgical time.  相似文献   
10.
Stylalgia     
Stylalgia is an important cause of paroxysmal dull pain in the throat and ear. Enlarged styloid process is the ossification stylohyoid ligament. Pain is aggravated by the act of deglutition. Pain due to enlarged styloid process may be attributed to the Glassopharyngeal Neuritis or stiff bony clasp formation. Styloidectomy, by any route, is a satisfactory mode of treatment in such cases. In cases with prolonged illness or no response with styloidectomy, Glassopharyngeal Neurectomy may be taken up.  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-23

京公网安备 11010802026262号