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   2644073篇
  免费   198522篇
  国内免费   27789篇
耳鼻咽喉   34967篇
儿科学   80721篇
妇产科学   71348篇
基础医学   379363篇
口腔科学   70347篇
临床医学   258593篇
内科学   496513篇
皮肤病学   50576篇
神经病学   206241篇
特种医学   99037篇
外国民族医学   909篇
外科学   372069篇
综合类   99402篇
现状与发展   78篇
一般理论   746篇
预防医学   206859篇
眼科学   62210篇
药学   206531篇
  341篇
中国医学   22245篇
肿瘤学   151288篇
  2021年   32509篇
  2020年   22284篇
  2019年   28133篇
  2018年   35991篇
  2017年   28426篇
  2016年   29775篇
  2015年   37673篇
  2014年   50111篇
  2013年   65614篇
  2012年   91524篇
  2011年   99160篇
  2010年   58956篇
  2009年   52341篇
  2008年   85988篇
  2007年   90629篇
  2006年   91627篇
  2005年   89476篇
  2004年   80352篇
  2003年   76751篇
  2002年   73980篇
  2001年   109584篇
  2000年   113195篇
  1999年   97744篇
  1998年   30996篇
  1997年   28610篇
  1996年   27479篇
  1995年   25871篇
  1994年   23932篇
  1993年   21417篇
  1992年   74716篇
  1991年   73290篇
  1990年   71388篇
  1989年   68521篇
  1988年   63463篇
  1987年   61815篇
  1986年   58935篇
  1985年   56248篇
  1984年   42134篇
  1983年   36167篇
  1982年   21843篇
  1979年   39160篇
  1978年   27693篇
  1977年   23371篇
  1976年   22507篇
  1975年   23897篇
  1974年   28623篇
  1973年   27903篇
  1972年   26198篇
  1971年   24299篇
  1970年   22640篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
101.
Finding appropriate soft-tissue to cover a wound located over the middle or distal portion of the foot can be challenging. A distally based sural fasciomusculocutaneous flap including the sural nerve and a midline cuff of the gastrocnemius muscle can be used for this purpose. This flap is designed on the proximal third of the posterior calf and is nourished in a retrograde manner by the lower peroneal septocutaneous perforators, through the vascular axis of the sural nerve to the musculocutaneous perforators of the gastrocnemius muscle. Between October of 2002 and January of 2004, this flap was applied in nine individuals, including four diabetic patients. The skin defects all resulted from trauma, osteomyelitis or chronic ulcer, and combined with bone or tendon exposure. One flap developed distal necrosis. The other flaps survived fully and provided good contour. In our series, diabetes mellitus seemed not to compromise the vascularity of the flap. The distally based sural fasciomusculocutaneous flap is very useful for lower limb reconstruction, particularly for the foot, because of its long vascular pedicle and the availability of the skin portion of the proximal calf based on direct branches between the musculocutaneous perforators and the neurovascular axis of the sural nerve. This is an important variant of the sural neurocutaneous flap and it appears to be a good alternative to free flaps for resurfacing the foot.  相似文献   
102.
103.
104.
105.
French asthma patients may be supervised by general practitioners (GPs) and/or specialists. Therefore, this study examined asthma management in patients exclusively supervised by specialists (SPE), GPs, (GP) and both (GP+SPE group), and compared the findings. Asthma patients were consecutively recruited in 348 pharmacies. Each patient completed a questionnaire providing data on personal characteristics, asthma management, perception of disease and asthma supervision. Asthma control was measured using the Asthma Control Test. Questionnaires were linked to computerised records of medications which had been dispensed before inclusion in the study. From the 1,256 patients (mean age = 36.1 yrs, 54.3% females), 11.4, 36.6, and 52.0% were placed in the SPE, GP, and GP+SPE groups, respectively. During the previous 4 weeks, most patients in the SPE group were properly controlled (52.2 versus 26.4 and 21.5% in GP and GP+SPE groups, respectively). The SPE group made more use of fixed combinations of long-acting beta agonist and inhaled corticosteroid, while receiving less short-acting beta agonists, antitussives and antibiotics. Striking differences in symptoms and asthma management were observed according to the type of asthma supervision. The current results strongly support the need to improve the management of asthma in primary care, and the coordination of care between general practitioners and specialists.  相似文献   
106.
107.
108.
置身RAIN CLUB的超凡境地中,美食、美酒和美妙的音乐是智灵的洗净,像干燥的北京城迎来第一场春天的“润”——稍显奢华。[编者按]  相似文献   
109.
Research coordinators in intensive care are a growing specialty about which little is known. This cross-sectional study surveyed the Australia and New Zealand Intensive Care Research Coordinators' Group (n = 49) regarding demographics, education, employment history, job structure, and role content. Most research coordinators were highly qualified and experienced nurses who undertake pharmaceutical trials, multicenter projects, departmental medical and nursing research, audits and data registries, and their own projects.  相似文献   
110.
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