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   20188篇
  免费   3614篇
  国内免费   73篇
耳鼻咽喉   363篇
儿科学   469篇
妇产科学   508篇
基础医学   309篇
口腔科学   1501篇
临床医学   6151篇
内科学   4115篇
皮肤病学   578篇
神经病学   2389篇
特种医学   569篇
外科学   2448篇
综合类   40篇
现状与发展   2篇
预防医学   2496篇
眼科学   383篇
药学   213篇
中国医学   3篇
肿瘤学   1338篇
  2024年   239篇
  2023年   1381篇
  2022年   394篇
  2021年   732篇
  2020年   1146篇
  2019年   494篇
  2018年   1512篇
  2017年   1666篇
  2016年   1657篇
  2015年   1688篇
  2014年   1929篇
  2013年   1889篇
  2012年   736篇
  2011年   734篇
  2010年   1096篇
  2009年   1472篇
  2008年   553篇
  2007年   373篇
  2006年   486篇
  2005年   301篇
  2004年   237篇
  2003年   201篇
  2002年   158篇
  2001年   282篇
  2000年   134篇
  1999年   230篇
  1998年   275篇
  1997年   290篇
  1996年   293篇
  1995年   249篇
  1994年   155篇
  1993年   146篇
  1992年   110篇
  1991年   85篇
  1990年   67篇
  1989年   86篇
  1988年   67篇
  1987年   49篇
  1986年   44篇
  1985年   46篇
  1984年   33篇
  1983年   23篇
  1982年   22篇
  1981年   18篇
  1980年   15篇
  1979年   8篇
  1978年   13篇
  1977年   10篇
  1976年   8篇
  1971年   9篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
The rubric complementary medicine covers a variety of approaches that may seem alike only in their being outside conventional care and training. We have asked experienced practitioners to present their own pieces of this jigsaw, realising that these clinical fragments, when seen together, create excitement but also confusion. Of course, this forum is not intended to be a comprehensive review of relevant complementary treatments, and often the individual apporaches to clinical problems will appear totally unrelated, while their apparent effectiveness stretches the biomedical model and conventional research methodology beyond their capacity. With this in mind, we intend that forthcoming articles and reviews will expand on the therapies themselves, and discuss the evidence supporting them.  相似文献   
32.
33.
BACKGROUND: Patients with varicose veins seek medical assistance for many reasons, including esthetic ones. The development of suitable and more flexible instruments, along with less invasive techniques, enables the establishment of new therapeutic procedures. OBJECTIVE: To compare endovenous great saphenous vein photocoagulation with an 810 nm diode laser and the conventional stripping operation in the same patient. METHODS: Twenty patients selected for operative treatment of primary great saphenous vein insufficiency on duplex scanning were assigned to a bilateral random comparison. In all cases, both techniques were performed, one on each lower limb. Clinically, evaluation was assessed on the seventh, thirtieth, and sixtieth postoperative days. Patients underwent examination with duplex ultrasonography and air plethysmography during the follow-up. RESULTS: Patients who received endovenous photocoagulation presented with the same pain but fewer swellings and less bruising than the stripping side. Most patients indicated that the limb operated on by laser received more benefits than the other. There was only one recanalization and no adverse effects. The venous filling time showed better hemodynamics in both techniques. CONCLUSION: The endovenous great saphenous vein photocoagulation is safe and well tolerated and presents results comparable to those of conventional stripping.  相似文献   
34.
35.
36.
37.
A literature search was conducted to identify 'nursing led in-patient units' where the nurse is the designated leader of the clinical team. The review concentrates on studies which have attempted to measure the impact of nursing-led in-patient units and reviews both the methodology and outcomes. Three major bodies of work were identified. Lydia Hall's evaluation of the Loeb Center for Nursing and Rehabilitation (USA) is reviewed in some detail. This work was the model for 'nursing beds' at the two Oxfordshire Nursing Development Units (UK) in the 1980s. Studies evaluating these centres are reviewed and reports of similar UK units discussed. A third body of work evaluates a nurse-managed critical care environment. Common features include a case mix based on nursing need with nurses having authority to admit and discharge patients. While results are generally favourable, with improved patient independence, fewer readmissions, lower mortality and cost savings reported in some or all of the studies, all studies reviewed demonstrate the difficulties of applying an experimental model to real life clinical services. Methodological limitations render firm conclusions difficult. Techniques adopted from studies in field settings, the so-called 'quasi-experiment', are advocated as a remedy, as is further study of the process of care in investigating this model of care delivery.  相似文献   
38.
Research shows that clients with automatic thoughts (dysfunctional thinking) often do not think of alternative explanations in relation to negative events. Furthermore, these automatic thoughts are characterized by a broad global, self-evaluative and ambiguous nature that could make disputing (or changing the ways they think) the most difficult part of the therapeutic process. This paper proposes a two-stage practise-based disputing model, guided by research, that aims to 'bring' an automatic thought to a specific, objective, quantifiable and concrete level at which not only is the particular aspect(s) of the automatic thought that causes emotional disturbances finely focused, but the disputing is also likely to be effective and manageable. Furthermore, it will also generate alternative explanations that are helpful in reducing emotional disturbances and in facilitating problem solving approach. In this paper, the authors use a case example to discuss the rationale that underpins the conceptualization of the model and to illustrate the process in which the strategies of the model are effectively used.  相似文献   
39.
A comparative study of dental arch forms was conducted according to their manifestation of relative tooth wear and occlusal sounds. Thirty-six subjects were grouped according to their dental treatment experience into one of five arch form categories. Significant differences in the severity of tooth wear were found between the five groups. Tooth sounds were also found to be related to the dental arch form, and thus dental treatment category.  相似文献   
40.
To learn and teach about HIV/AIDS is to enter complex and senstitive territory that at times may be personally challenging. 5 In the vast literature on HIV infection and nursing two main themes recur: nurses' lack of understanding, negative attitudes and anxieties related to HIV/AIDS and the need for education to change such attitudes and enhance nurses' knowledge and skills.  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