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   19794篇
  免费   1352篇
  国内免费   37篇
耳鼻咽喉   116篇
儿科学   721篇
妇产科学   584篇
基础医学   2483篇
口腔科学   201篇
临床医学   3280篇
内科学   3368篇
皮肤病学   236篇
神经病学   1732篇
特种医学   429篇
外科学   1831篇
综合类   195篇
一般理论   24篇
预防医学   2829篇
眼科学   204篇
药学   1287篇
中国医学   20篇
肿瘤学   1643篇
  2024年   30篇
  2023年   170篇
  2022年   230篇
  2021年   412篇
  2020年   315篇
  2019年   428篇
  2018年   497篇
  2017年   431篇
  2016年   445篇
  2015年   471篇
  2014年   673篇
  2013年   1029篇
  2012年   1465篇
  2011年   1624篇
  2010年   856篇
  2009年   744篇
  2008年   1321篇
  2007年   1405篇
  2006年   1375篇
  2005年   1398篇
  2004年   1278篇
  2003年   1242篇
  2002年   1120篇
  2001年   156篇
  2000年   105篇
  1999年   163篇
  1998年   208篇
  1997年   171篇
  1996年   144篇
  1995年   115篇
  1994年   120篇
  1993年   123篇
  1992年   90篇
  1991年   68篇
  1990年   75篇
  1989年   45篇
  1988年   52篇
  1987年   37篇
  1986年   45篇
  1985年   35篇
  1984年   53篇
  1983年   49篇
  1982年   58篇
  1981年   49篇
  1980年   41篇
  1979年   34篇
  1978年   20篇
  1977年   25篇
  1974年   24篇
  1973年   16篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
BACKGROUND: Psychological morbidity after an acute myocardial infarction (AMI) is known to be common, but can be addressed by appropriate rehabilitation. The area in which this research was conducted experiences high rates of deprivation and of coronary heart disease and limited access to hospital-based rehabilitation. Responding to concern about psychological needs of AMI patients, a self-help package was introduced and evaluated alongside standard hospital-based cardiac rehabilitation. AIMS: To evaluate the impact of a home-based self-help package (the Heart Manual), alongside existing cardiac rehabilitation provision, on psychological morbidity and health status after AMI. A secondary aim was to assess the suitability of the Heart Manual for older patients aged over 80 years. METHODS: A controlled observational study, comparing two cohorts of patients discharged from hospital after AMI. The intervention group was given the self-help package in addition to standard care. The control group received standard care alone. Outcome measures used were the Hospital Anxiety and Depression Scale and the EuroQol. RESULTS: The intervention group showed significant improvement in anxiety and depression scores after 3 months and nonsignificant improvement in general health status. Patients who attended hospital-based rehabilitation classes, and those aged over 80 years, also benefited from the intervention. CONCLUSION: A home-based self-help rehabilitation package is an effective tool alongside hospital-based rehabilitation classes and can be given to all age groups.  相似文献   
53.
54.
Aim:  To present an evidence-based framework to improve the quality of occupational therapy expert opinions on work capacity for litigation, compensation and insurance purposes.
Methods:  Grounded theory methodology was used to collect and analyse data from a sample of 31 participants, comprising 19 occupational therapists, 6 medical specialists and 6 lawyers. A focused semistructured interview was completed with each participant. In addition, 20 participants verified the key findings.
Results:  The framework is contextualised within a medicolegal system requiring increasing expertise. The framework consists of (i) broad professional development strategies and principles, and (ii) specific strategies and principles for improving opinions through reporting and assessment practices.
Conclusions:  The synthesis of the participants' recommendations provides systematic guidelines for improving occupational therapy expert opinion on work capacity.  相似文献   
55.
Risperidone was effective in successfully treating a patient's negative symptoms of schizophrenia as well as reducing adverse effects from typical antipsychotic drugs. Auditory hallucinations reemerged after 8 months, however, and again after 24 months of risperidone therapy. Reemergence of psychotic symptoms after initial response might be explained by inadequate dosage, by the natural course of the patient's schizophrenia independent of drug therapy, or by the possibility that, for this patient, risperidone was less effective than chlorpromazine for the positive symptom of auditory hallucinations.  相似文献   
56.
TOPIC. Nursing assessment of altered sexuality.
PURPOSE. To review salient factors affecting assessment and objective measures available for use in assessment.
SOURCE. Literature specific to nursing assessment of sexuality and to instruments measuring altered sexuality.
CONCLUSIONS. Many standards of care include the assessment of sexuality, and nurses believe it to be an important aspect of care. However, the assessment of altered sexuality does not often occur in actual practice. The use of an objective measure of sexuality is recommended for both initial and on-going assessments in acute-care and community-based settings.  相似文献   
57.
This paper reports the prevalence of chronic esophagitis and nutritional status among 538 young persons aged 15 to 26 years from the high risk area for esophageal cancer. Of these subjects, 166 were from households with history of esophageal cancer and 372 were from households without history of esophageal cancer. The Incidences of chronic esophagltis among male and female adolescents were 37. 6% and 36% respectively, which was significantly higher than those in the low risk area (17%). The frequency of chronic esophagltis in the adolescents in the households with history of esophageal cancer was aiso higher than in those In the households without history of esophageal cancer. The deficiencies of vitamins, especially of riboflavin and ascorbate, are prevalent and severe among these adolescents. Ascorbate deficiency Is correlated with the severity of the chronic esophagltis. These results indicate that chronic esophagltis may be involved in the natural history of esophageal carclnogenesis. Nutrient defic  相似文献   
58.
Abstract Traditional Native American people are experiencing serious health, economic, and social problems resulting from alcoholism. Native Americans maintain a worldview of health and illness that conflicts with the dominant culture's approach to treatment. The purposes of this study were to describe the health beliefs of traditional Muscogee (Creek) Indians concerning the causes of illness and learn how these beliefs relate to alcoholism. The researchers conducted in-depth interviews of 55 traditional Muscogee (Creek) participants to learn traditional beliefs about illness and alcoholism. Data were analyzed using content analysis. Results indicate that both illness and alcoholism are perceived as having natural and unnatural (supernatural) causes. A challenge facing nurses is how to provide culturally sensitive care when clients' and nurses' beliefs about the cause of alcoholism may be in conflict. The authors discuss preservation, accommodation, and repatterning of health care beliefs as a basis for planning culturally sensitive nursing care.  相似文献   
59.
60.
A patient with severe nocturnal asthma of multifactorial pathogenesis with high-risk features leading to several episodes of nocturnal respiratory arrests is described. Despite aggressive conventional therapy with broncho-dilators and glucocorticoid agents, the patient had progressive worsening within the year prior to admission. After a nonconventional approach consisting of: high-dose inhaled steroids, afternoon dose of prednisone, addition of troleandomycin therapy, high-dose inhaled ipratropium at bedtime, maximizing serum theophylline concentrations in the early morning, and nasal CPAP through the night; the patient's pulmonary functions were optimized with minimal or no reduction in morning FEV1, and decreased airways hyperresponsiveness to methacholine.  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