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   4610篇
  免费   267篇
  国内免费   17篇
耳鼻咽喉   39篇
儿科学   145篇
妇产科学   79篇
基础医学   593篇
口腔科学   109篇
临床医学   462篇
内科学   1042篇
皮肤病学   102篇
神经病学   523篇
特种医学   82篇
外国民族医学   1篇
外科学   547篇
综合类   48篇
一般理论   1篇
预防医学   392篇
眼科学   63篇
药学   282篇
中国医学   8篇
肿瘤学   376篇
  2024年   10篇
  2023年   48篇
  2022年   106篇
  2021年   169篇
  2020年   96篇
  2019年   137篇
  2018年   151篇
  2017年   105篇
  2016年   127篇
  2015年   129篇
  2014年   207篇
  2013年   221篇
  2012年   365篇
  2011年   366篇
  2010年   177篇
  2009年   193篇
  2008年   283篇
  2007年   300篇
  2006年   293篇
  2005年   223篇
  2004年   233篇
  2003年   226篇
  2002年   197篇
  2001年   39篇
  2000年   46篇
  1999年   42篇
  1998年   28篇
  1997年   28篇
  1996年   21篇
  1995年   19篇
  1994年   19篇
  1993年   17篇
  1992年   12篇
  1991年   16篇
  1990年   10篇
  1989年   12篇
  1988年   16篇
  1987年   16篇
  1986年   11篇
  1985年   15篇
  1984年   14篇
  1983年   9篇
  1982年   8篇
  1981年   11篇
  1979年   9篇
  1977年   9篇
  1974年   10篇
  1969年   14篇
  1968年   13篇
  1967年   9篇
排序方式: 共有4894条查询结果,搜索用时 27 毫秒
101.
Chronic pain has been shown to affect up to 60% of patients undergoing surgery for breast cancer. Besides younger age, other risk factors for the development of chronic pain have not been consistent in previous studies. The objective of the current investigation was to detect the prevalence and risk factors for the development of chronic pain after breast cancer surgery by examining a patient population from a tertiary cancer center in the United States. The study was a prospective observational cohort study. Subjects were evaluated at least 6 months after the surgical procedure. Subjects responded to the modified short form Brief pain inventory and the short form McGill pain questionnaire to identify and characterize pain. Demographic, surgery, cancer treatment, and perioperative characteristics were recorded. Propensity matching regression analysis were used to examine risk factors associated with the development of chronic pain. 300 patients were included in the study. 110 reported the presence of chronic pain. Subjects with chronic pain reported median (interquartile range [IQR]) rating of worst pain in the last 24 hours of 4 (2–5) and a median (IQR) rating on average pain in the last 24 hours of 3 (1–4) on a 0–10 numeric rating scale. Independent risk factors associated with the development of chronic pain were age, OR (95% CI) of 0.95 (0.93–0.98) and axillary lymph node dissection, 7.7 (4.3–13.9) but not radiation therapy, 1.05(0.56–1.95). After propensity matching for confounding covariates, radiation was still not associated with the development of chronic pain. Chronic pain after mastectomy continues to have a high prevalence in breast cancer patients. Younger age and axillary lymph node dissection but not radiation therapy are risk factors for the development of chronic pain. Preventive strategies to minimize the development of chronic pain are highly desirable.  相似文献   
102.
103.
104.
105.
To date, life course research in maternal and child health has largely focused on elucidating fetal and early life influences on adult health and less on promoting the health of children with special health care needs (CSHCN). Consideration of life course theory (LCT) for CSHCN is especially important given their increasing prevalence and comorbidity, their disproportionate vulnerability to weaknesses or instability in the health care system, and the growing evidence linking child and adult health and quality of life. In this commentary we seek to advance the consideration of LCT for CSHCN. We (1) briefly summarize key issues and the importance of a life course approach for CSHCN; (2) present illustrative findings from population-based cross-sectional data that serve to generate hypotheses that can be more rigorously examined when population-based longitudinal data become available; and (3) discuss the application of life course principles as a driving force in the continued implementation and improvement of integrated systems of care for CSHCN.  相似文献   
106.
The aim of this study was to analyze the impact of maternal postpartum depression and/or anxiety disorders according to DMS-IV on maternal self-confidence throughout infancy and early childhood. Exploratively, associations between maternal attachment insecurity and maternal self-confidence at pre-school age were examined. The sample (N = 54) of this prospective longitudinal study was comprised of n = 27 women with postpartum depression and/or anxiety disorders according to DSM-IV criteria and n = 27 healthy women without present or history of mental health disorders or psychotherapy. Data was collected in the postpartum period (M = 60.08 days) and at pre-school age (M = 4.7 years). Subjects were recruited between 2004 and 2011 in South Germany. Data revealed a significant difference in maternal self-confidence between clinical and control group at child′s pre-school age: Women with postpartum depression and/or anxiety disorder scored lower on maternal self-confidence than healthy controls, but only if they had current SCID-diagnoses or partly remitted symptoms. According to explorative analyses maternal attachment insecurity turned out to be the strongest predictor of maternal self-confidence at pre-school age besides maternal mental health status. The results emphasize the impact of attachment insecurity and maternal mental health regarding maternal self-confidence leading to potential adverse long-term consequences for the mother–child relationship. Attachment based interventions taking maternal self-confidence into account are needed.  相似文献   
107.
108.
109.
Journal of Thrombosis and Thrombolysis - Oral anticoagulants (OACs) are high alert medications and require high-quality management to optimize health outcomes. The objective of this scoping review...  相似文献   
110.
Prenatal alcohol exposure (PAE) is one of the most prevalent and modifiable risk factors for somatic, behavioral, and neurological abnormalities. Affected individuals exhibit a wide range of such features referred to as fetal alcohol spectrum disorders (FASD). These are characterized by a more or less specific pattern of minor facial dysmorphic features, growth deficiency and central nervous system symptoms. Nevertheless, whereas the diagnosis of the full-blown fetal alcohol syndrome does not pose a major challenge, only a tentative diagnosis of FASD can be reached if only mild features are present and/or maternal alcohol consumption during pregnancy cannot be verified. The respective disorders have lifelong implications. The teratogenic mechanisms induced by PAE can lead to various additional somatic findings and structural abnormalities of cerebrum and cerebellum. At the functional level, cognition, motor coordination, attention, language development, executive functions, memory, social perception and emotion processing are impaired to a variable extent. The long-term development is characterized by disruption and failure in many domains; an age-adequate independency is frequently not achieved. In addition to primary prevention, individual therapeutic interventions and tertiary prevention are warranted; provision of extensive education to affected subjects and their caregivers is crucial. Protective environments are often required to prevent negative consequences such as delinquency, indebtedness or experience of physical/sexual abuse.  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