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   19217篇
  免费   3448篇
  国内免费   149篇
耳鼻咽喉   480篇
儿科学   503篇
妇产科学   524篇
基础医学   1794篇
口腔科学   369篇
临床医学   4028篇
内科学   3632篇
皮肤病学   491篇
神经病学   1369篇
特种医学   691篇
外科学   2568篇
综合类   574篇
现状与发展   2篇
一般理论   5篇
预防医学   2724篇
眼科学   253篇
药学   1041篇
  1篇
中国医学   109篇
肿瘤学   1656篇
  2024年   85篇
  2023年   444篇
  2022年   168篇
  2021年   391篇
  2020年   579篇
  2019年   299篇
  2018年   719篇
  2017年   719篇
  2016年   765篇
  2015年   845篇
  2014年   913篇
  2013年   1354篇
  2012年   849篇
  2011年   813篇
  2010年   775篇
  2009年   869篇
  2008年   695篇
  2007年   667篇
  2006年   741篇
  2005年   627篇
  2004年   598篇
  2003年   537篇
  2002年   500篇
  2001年   557篇
  2000年   542篇
  1999年   494篇
  1998年   387篇
  1997年   416篇
  1996年   431篇
  1995年   343篇
  1994年   256篇
  1993年   212篇
  1992年   365篇
  1991年   349篇
  1990年   287篇
  1989年   303篇
  1988年   290篇
  1987年   256篇
  1986年   226篇
  1985年   215篇
  1984年   175篇
  1983年   172篇
  1982年   119篇
  1981年   132篇
  1980年   92篇
  1979年   147篇
  1978年   97篇
  1977年   100篇
  1976年   96篇
  1974年   104篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
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   
72.
73.
74.
Repair and regeneration are mutually exclusive responses to injury. Previous studies have shown that wound fluids promote proliferation, but not differentiation, of myoblasts in vitro. This study explored the ability of the repair environment within polyvinyl alcohol sponges to support cellular events of skeletal muscle regeneration in vivo. Neonatal rat L8 myoblasts were modified to express beta-galactosidase then inoculated into plain sponges or sponges containing minced muscle. Labeled myoblasts were found in myotubes within minced muscle. In contrast, myoblasts inoculated into sponges lacking muscle remained mononucleate. Occurrence of labeled myoblasts within myotubes, which required fusion, represents differentiation of inoculated myoblasts to participate in regeneration. Failure of myoblasts to form myotubes in sponges lacking muscle suggests that this wound repair environment cannot support morphologic differentiation of myoblasts. Although this repair environment can support the survival of myoblasts, it did not support myogenesis, an event necessary to complete skeletal muscle regeneration. Data from this study reinforce earlier studies in vitro and suggest that the properties attributed to wound fluids are inherent in the wound environment. Whether the inability of this environment to support myogenesis is the consequence of the absence of essential factors or the presence of inhibitors remains to be determined.  相似文献   
75.
76.
This paper presents the results of a qualitative study conducted by midwife researchers into women's experience of new motherhood. Data were collected using focus groups involving 55 first-time mothers and analysed using grounded theory method. The analysis produced six categories: 'realizing', 'unready', 'drained', 'aloneness', 'loss' and 'working it out'. The core category, 'becoming a mother', integrates all other categories and encapsulates the process of change experienced by women. Also explained are factors mediating the often distressing experience of becoming a mother. The analysis provides a conceptualization of early motherhood enabling the development of strategies for midwives, nurses and others helping women negotiate this challenge.  相似文献   
77.
The history of antenatal education throws light on why contemporary class attenders represent only a particular section of the childbearing population. Since Victorian times, the non-availability of the women's network to middle class women has forced them to seek knowledge of their own bodies, confidence in their childbearing capacities and the support of other women through formal educational opportunities. Research suggests that antenatal classes often fail to provide women with a realistic account of birth and parenting to replace the lived experience of earlier decades and may not be facilitated in such a way as to create the support groups which class attenders critically need. Teaching approaches often promote dependency amongst clients rather than nurturing the decision-making skills required by a consumer-driven maternity service.  相似文献   
78.
The results of a survey of children attending an Accident and Emergency (A & E) Department following ingestion of alcohol are reported. Data were analysed to indicate age and sex of children, date and time of attendance, method of transport to hospital, whether accompanied to hospital and if so by whom, and whether admitted or discharged. Trends in children's consumption of alcohol, as observed by the author, are discussed.  相似文献   
79.
This paper reports the psychometric testing of the Worthing Chemotherapy Questionnaire(WCQ). The WCQ is a patient self-report instrument to document side-effects of chemotherapy. Literature review of relevant studies shows that psychometric testing of similar instruments is rarely rigorous. Content validity for the WCQ was established in five ways: literature review, Delphi review among oncology staff, pre-pilot unstructured interviews, pilot study and amendment of the instrument and items for spontaneous reporting of problems on the questionnaire. A three-stage approach to construct validity was used. The hypothesis adopted was that as certain cytotoxic agents cause stomatitis, incidence and severity of stomatitis will decrease following cessation of treatment. Stage 1: factor analysis confirmed the presence of a sole factor, with an eigenvalue of 5.3, for mouth problems which explained 65.5% of the variance. Stage 2: the hypothesis was confirmed using research findings. Stage 3: the Wilcoxon test showed highly significant results for during and post chemotherapy stomatitis scores. Reliability of the questionnaire was assessed using the test-retest method. Weighted Kappa was chosen as the test statistic. A median value of wK=0.87 was obtained. The results indicate that the WCQ is a reliable and valid instrument.  相似文献   
80.
A national study was conducted between 1991 and 1994 to explore and describe the changing role of the nurse teacher following the introduction of Project 2000 pre-registration nursing courses. Multiple methods were used to collect data from a wide variety of respondents (nurse teachers, midwife teachers, clinical nurses, health service managers and higher education lecturers). This paper presents the findings relating to the impact of Project 2000 and the move into higher education on the continuing educational needs of nurse teachers. Views on college strategies for staff development, the changing nature of teachers'academic and professional development needs and the problems of the conflicting demands experienced are reported. The research highlights the need for clinical credibility to be clearly defined in relation to nurse teachers and for educational institutions to place more emphasis on teachers'clinical development if the rhetoric of policy is to become a reality.  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