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   19405篇
  免费   1806篇
  国内免费   56篇
耳鼻咽喉   271篇
儿科学   639篇
妇产科学   455篇
基础医学   2305篇
口腔科学   631篇
临床医学   2122篇
内科学   3555篇
皮肤病学   285篇
神经病学   1922篇
特种医学   518篇
外科学   2672篇
综合类   228篇
一般理论   23篇
预防医学   2611篇
眼科学   425篇
药学   1048篇
  7篇
中国医学   18篇
肿瘤学   1532篇
  2024年   151篇
  2023年   385篇
  2022年   539篇
  2021年   1044篇
  2020年   648篇
  2019年   908篇
  2018年   1003篇
  2017年   683篇
  2016年   714篇
  2015年   683篇
  2014年   915篇
  2013年   1113篇
  2012年   1574篇
  2011年   1553篇
  2010年   811篇
  2009年   665篇
  2008年   1065篇
  2007年   1047篇
  2006年   806篇
  2005年   764篇
  2004年   643篇
  2003年   552篇
  2002年   471篇
  2001年   236篇
  2000年   235篇
  1999年   194篇
  1998年   117篇
  1997年   84篇
  1996年   65篇
  1995年   79篇
  1994年   66篇
  1993年   46篇
  1992年   114篇
  1991年   124篇
  1990年   87篇
  1989年   75篇
  1988年   83篇
  1987年   103篇
  1986年   68篇
  1985年   77篇
  1984年   61篇
  1983年   67篇
  1982年   47篇
  1981年   46篇
  1980年   42篇
  1979年   52篇
  1978年   54篇
  1974年   29篇
  1973年   48篇
  1972年   29篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Community Mental Health Journal - This study examined the impact of Pathway Home™ (PH) transition services for high utilizers of psychiatric hospitalization on inpatient days and outpatient...  相似文献   
82.
Journal of Autism and Developmental Disorders - Autism spectrum disorder (ASD) and fragile X syndrome (FXS) are neurodevelopmental disorders with overlapping pragmatic language impairments. Prior...  相似文献   
83.

Youth accessing mental health care often experience a disruption in care as they attempt to transition between child and adolescent mental health services (CAMHS) and adult mental health services (AMHS). Few studies have evaluated interventions seeking to improve the experience and outcomes of CAMHS–AMHS transitions, in part due to lack of consensus on what constitutes best practices in intervention success. As such, the aim of this study was to engage patients, caregivers, and clinicians to prioritize core components of successful CAMHS–AMHS transitions which can be used in the design or evaluation of transition interventions. As such, a Delphi study was conducted to determine core components of successful CAMHS–AMHS transitions. Guided by the principles of patient-oriented research, three balanced expert panels consisting of youth, caregivers, and clinicians ranked and provided feedback on the importance and feasibility of core components of CAMHS-AMHS transitions. Components endorsed as feasible or important with ≥ 70% agreement from any panel moved to the next round. As a result, a list of 26 core components of CAMHS–AMHS transitions has been refined which can be used in the design, implementation, or evaluation of interventions intended to improve transition experiences and outcomes for youth in mental health care. Youth and families were engaged in an expert advisory role throughout the research process, contributing their important perspectives to the design and implementation of this study, as well as interpretation of the findings.

  相似文献   
84.
Structural hippocampal abnormalities are common in many neurological and psychiatric disorders, and variation in hippocampal measures is related to cognitive performance and other complex phenotypes such as stress sensitivity. Hippocampal subregions are increasingly studied, as automated algorithms have become available for mapping and volume quantification. In the context of the Enhancing Neuro Imaging Genetics through Meta Analysis Consortium, several Disease Working Groups are using the FreeSurfer software to analyze hippocampal subregion (subfield) volumes in patients with neurological and psychiatric conditions along with data from matched controls. In this overview, we explain the algorithm's principles, summarize measurement reliability studies, and demonstrate two additional aspects (subfield autocorrelation and volume/reliability correlation) with illustrative data. We then explain the rationale for a standardized hippocampal subfield segmentation quality control (QC) procedure for improved pipeline harmonization. To guide researchers to make optimal use of the algorithm, we discuss how global size and age effects can be modeled, how QC steps can be incorporated and how subfields may be aggregated into composite volumes. This discussion is based on a synopsis of 162 published neuroimaging studies (01/2013–12/2019) that applied the FreeSurfer hippocampal subfield segmentation in a broad range of domains including cognition and healthy aging, brain development and neurodegeneration, affective disorders, psychosis, stress regulation, neurotoxicity, epilepsy, inflammatory disease, childhood adversity and posttraumatic stress disorder, and candidate and whole genome (epi-)genetics. Finally, we highlight points where FreeSurfer-based hippocampal subfield studies may be optimized.  相似文献   
85.
Brain Imaging and Behavior - Trichotillomania (hair pulling disorder) and skin picking disorder are common and often debilitating mental health conditions, grouped under the umbrella term of body...  相似文献   
86.
Obesity Surgery - Bariatric surgery is the most effective and durable treatment option for clinically severe obesity. Unfortunately, some degree of weight regain (WR) is common after nadir weight...  相似文献   
87.
Leveraging technology to provide evidence-based therapy for posttraumatic stress disorder (PTSD), such as prolonged exposure (PE), during the COVID-19 pandemic helps ensure continued access to first-line PTSD treatment. Clinical video teleconferencing (CVT) technology can be used to effectively deliver PE while reducing the risk of COVID-19 exposure during the pandemic for both providers and patients. However, provider knowledge, experience, and comfort level with delivering mental health care services, such as PE, via CVT is critical to ensure a smooth, safe, and effective transition to virtual care. Further, some of the limitations associated with the pandemic, including stay-at-home orders and physical distancing, require that providers become adept at applying principles of exposure therapy with more flexibility and creativity, such as when assigning in vivo exposures. The present paper provides the rationale and guidelines for implementing PE via CVT during COVID-19 and includes practical suggestions and clinical recommendations.  相似文献   
88.
World Journal of Surgery - There are complex barriers that increase delays to surgical care in low- and middle-income countries, particularly among the vulnerable population of children....  相似文献   
89.
World Journal of Surgery - Congenital anomalies have risen to become the fifth leading cause of under-five mortality globally. The majority of deaths and disability occur in low- and middle-income...  相似文献   
90.
In conjunction with cartilage breakdown, muscle maladaptation including atrophy and increased fibrosis have been observed in the quadriceps following anterior cruciate ligament (ACL) injury. Previously observed upregulated muscle-related proteins in the synovial fluid following ACL rupture allude to cellular communication between the joint and muscle. Therefore, the purpose of this study was to determine whether muscle-related analytes are differentially expressed in the serum. Sixteen patients with an acute ACL tear participated in this IRB-approved study. Serum was obtained at two different time points at a mean of 6 and 14 days post-injury, and serum was analyzed by a highly multiplexed assay of 1,300 proteins. Pathway analysis using DAVID was performed; genes included met three criteria: significant change between the two study time points using a paired t test, significant change between the two study time points using a Mann–Whitney non-parametric test, and significant Benjamini post hoc analysis. Twelve analytes significantly increased between time points. Proteins chitinase-3-like protein 1 (p = 0.01), insulin-like growth factor binding protein 1 (p = 0.01), insulin-like growth factor binding protein 5 (p = 0.02), renin (p = 0.004), and lymphotoxin alpha 1: beta 2 (p = 0.03) were significantly upregulated in serum following acute ACL injury. The current results confirm the inflammatory pattern previously seen in the synovial fluid thought to play a role in the progression of post-traumatic osteoarthritis after ACL injury, and this data also provides further insights into important communication between the joint and quadriceps group, whose function is important in long term health. © 2019 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 38:387-392, 2020  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