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   219056篇
  免费   3713篇
  国内免费   306篇
耳鼻咽喉   1847篇
儿科学   8634篇
妇产科学   4066篇
基础医学   21548篇
口腔科学   3555篇
临床医学   16225篇
内科学   39573篇
皮肤病学   1828篇
神经病学   19728篇
特种医学   10256篇
外科学   35764篇
综合类   3231篇
一般理论   18篇
预防医学   20798篇
眼科学   3944篇
药学   12440篇
  3篇
中国医学   1131篇
肿瘤学   18486篇
  2024年   88篇
  2023年   448篇
  2022年   464篇
  2021年   1020篇
  2020年   692篇
  2019年   940篇
  2018年   23234篇
  2017年   18361篇
  2016年   20524篇
  2015年   2046篇
  2014年   2109篇
  2013年   2847篇
  2012年   10183篇
  2011年   24685篇
  2010年   20446篇
  2009年   12497篇
  2008年   22493篇
  2007年   24831篇
  2006年   3761篇
  2005年   5383篇
  2004年   6377篇
  2003年   7186篇
  2002年   5108篇
  2001年   1215篇
  2000年   1457篇
  1999年   791篇
  1998年   442篇
  1997年   419篇
  1996年   266篇
  1995年   262篇
  1994年   238篇
  1993年   179篇
  1992年   136篇
  1991年   171篇
  1990年   217篇
  1989年   152篇
  1988年   114篇
  1987年   89篇
  1986年   65篇
  1985年   80篇
  1984年   69篇
  1983年   57篇
  1982年   78篇
  1981年   43篇
  1980年   80篇
  1977年   39篇
  1974年   38篇
  1938年   60篇
  1932年   57篇
  1930年   46篇
排序方式: 共有10000条查询结果,搜索用时 125 毫秒
31.
Conclusions  Noninvasive imaging of neurohumoral upregulation in remodeled myocardium suggests that an imaging strategy can be developed for predicting the rate of remodeling and likelihood of HF development. This should allow a more judicious use of neurohumoral antagonists especially in subjects who do not have manifest HF.74 In others specific targeted imaging may allow timely selection of individualized treatment strategies and ensure optimization of therapeutic intervention. Similar to ACE and AII receptors, multiple other targets in the hormonal cascades can identify the likelihood of adverse and favorable remodeling.74  相似文献   
32.
33.
Single-agent chemotherapy of metastatic breast cancer is the treatment of choice in patients with slow tumor progression and asymptomatic disease. In this patient group, the choice of drugs is based more on good tolerability than on efficacy. By contrast, symptomatic or rapidly progressing disease requires the use of highly active regimens where more weight is put on reliable antitumor activity. While anthraycline-based combination regimens have set the standard of effective treatment, the addition of docetaxel (and to a lesser extent paclitaxel) has improved tumor response, but failed to induce a consistent prolongation of survival. Based on retrospective analyses, it is hypothesised that the combined use of anthracyclines and taxanes in first-line therapy may be most beneficial in defined subgroups: after adjuvant chemotherapy, in patients with HER-2 gene amplification, possibly also in patients with rapidly progressing visceral disease.  相似文献   
34.
35.
36.
Antegrade interlocking nailing of humeral shaft fractures   总被引:5,自引:0,他引:5  
The results of 39 humeral shaft fractures (37 patients) treated with antegrade locked nailing using a Russell–Taylor nail were reviewed. There were 30 acute fractures, 6 fractures malaligned in a hanging cast or brace, and 3 pathological fractures. Patient age ranged from 26 to 80 years (average, 59.7 years) and average follow-up was 25.7 months (range, 6–48 months). Fracture union was achieved in 92.3% of our cases, while shoulder function was excellent or good in 87.2% of cases. Antegrade locked nailing offers a dependable solution for the treatment of humeral shaft fractures, especially in polytrauma patients and cases of segmental or pathological fractures. Far less satisfactory results were obtained in comminuted fractures of the proximal third in the humerus, especially in osteoporotic patients, and we therefore advocate caution with the use of intramedullary nailing in this type of fracture. Certain technical aspects such as avoiding nailing the fracture in distraction, properly countersinking the tip of the nail, and achieving adequate fixation stability have been found to be of paramount importance to reduce the incidence of delayed union/non-union rate and to obtain better functional results from the shoulder joint.  相似文献   
37.
38.
Conclusion In the year 2003 there is no “one best bariatric operation” for every severely obese patient. The choice of operation must be tailored to each individual patient’s needs and wishes. For the superobese patient, the patient diagnosed with intestinal metaplasia of the stomach, and for those patients who do not wish to undergo the severe dietary restrictions imposed by the RNY-GB, the BPD-DS is a valuable surgical option.  相似文献   
39.
40.
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