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   2471584篇
  免费   205177篇
  国内免费   4713篇
耳鼻咽喉   35519篇
儿科学   75316篇
妇产科学   64873篇
基础医学   347624篇
口腔科学   69813篇
临床医学   225621篇
内科学   488325篇
皮肤病学   49309篇
神经病学   209633篇
特种医学   99838篇
外国民族医学   886篇
外科学   376355篇
综合类   57741篇
现状与发展   2篇
一般理论   1135篇
预防医学   200462篇
眼科学   57718篇
药学   184531篇
  6篇
中国医学   4491篇
肿瘤学   132276篇
  2018年   26256篇
  2017年   20303篇
  2016年   22220篇
  2015年   25194篇
  2014年   36373篇
  2013年   55328篇
  2012年   75035篇
  2011年   79044篇
  2010年   46345篇
  2009年   44437篇
  2008年   74940篇
  2007年   79635篇
  2006年   80245篇
  2005年   78522篇
  2004年   75562篇
  2003年   72905篇
  2002年   71949篇
  2001年   113351篇
  2000年   117238篇
  1999年   99361篇
  1998年   29078篇
  1997年   26450篇
  1996年   26396篇
  1995年   25485篇
  1994年   23919篇
  1993年   22316篇
  1992年   79958篇
  1991年   77013篇
  1990年   74114篇
  1989年   71345篇
  1988年   66386篇
  1987年   65332篇
  1986年   61893篇
  1985年   59047篇
  1984年   44902篇
  1983年   38318篇
  1982年   23747篇
  1981年   21229篇
  1980年   19793篇
  1979年   41757篇
  1978年   29511篇
  1977年   24822篇
  1976年   23254篇
  1975年   24358篇
  1974年   30016篇
  1973年   28401篇
  1972年   26470篇
  1971年   24398篇
  1970年   22960篇
  1969年   21261篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
71.
72.
73.
74.
75.
Caring for patients with end-stage kidney disease (ESKD) in the United States is challenging, due in part to the complex epidemiology of the disease's progression as well as the ways in which care is delivered. As CKD progresses toward ESKD, the number of comorbidities increases and care involves multiple healthcare providers from multiple subspecialties. This occurs in the context of a fragmented US healthcare delivery system that is traditionally siloed by provider specialty, organization, as well as systems of payment and administration. This article describes the role of care fragmentation in the delivery of optimal ESKD care and identifies research gaps in the evidence across the continuum of care. We then consider the impact of care fragmentation on ESKD care from the patient and health system perspectives and explore opportunities for system-level interventions aimed at improving care for patients with ESKD.  相似文献   
76.
77.
Context: Persons with spinal cord injury (SCI) experience significant challenges when they access primary care and community services.

Design: A provincial summit was held to direct research, education, and innovation for primary and community care for SCI.

Setting: Toronto, Ontario, Canada.

Participants: Key stakeholders (N?=?95) including persons with SCI and caregivers, clinicians from primary care, rehabilitation, and specialized care, researchers, advocacy groups, and policy makers.

Methods: A one-day facilitated meeting that included guest speakers, panel discussions and small group discussions was held to generate potential solutions to current issues related to SCI care and to foster collaborative relationships to advance care for SCI. Perspectives on SCI management were shared by primary care, neurosurgery, rehabilitation, and members of the SCI community

Outcome Measures: Discussions were focused on five domains: knowledge translation and dissemination, application of best practices, communication, research, and patient service accessibility.

Results: Summit participants identified issues and prioritized solutions to improve primary and community care including the creation of a network of key stakeholders to enable knowledge creation and dissemination; an online repository of SCI resources, integrated health records, and a clinical network for SCI care; development and implementation of strategies to improve care transitions across sectors; implementation of effective care models and improved access to services; and utilization of empowerment frameworks to support self-management.

Conclusions: This summit identified priorities for further collaborative efforts to advance SCI primary and community care and will inform the development of a provincial SCI strategy aimed at improving the system of care for SCI.  相似文献   
78.
79.
80.
Red cell exchange (RCE) is a common procedure in adults with sickle cell disease (SCD). Implantable dual lumen Vortex (DLV) ports can be used for RCE in patients with poor peripheral venous access. We performed a retrospective cohort study of RCE procedures performed in adults with SCD. The main objective of the study was to compare the inlet speed, duration of procedures and rate of complications performed through DLV ports to those performed through temporary central venous and peripheral catheters. Twenty‐nine adults with SCD underwent a total of 318 RCE procedures. Twenty adults had DLV ports placed and 218 procedures were performed using DLV ports. Mean length of follow‐up after DLV port placement was 397 ± 263 days. Six DLV ports were removed due to infection and 1 for malfunction after a mean of 171 ± 120 days. Compared to temporary central venous and peripheral catheters, DLV port procedures had a greater rate of procedural complications, a longer duration, and a lower inlet speed (all P < 0.01). When accounting for the maximum allowable inlet speed to avoid citrate toxicity, 40% of DLV port procedures were greater than 10% below maximum speed, compared to 7 and 14% of procedures performed through temporary central venous and peripheral catheters (P < 0.0001). In conclusion, DLV ports can be used for RCE in adults with SCD, albeit with more procedural complications and longer duration. The smaller internal diameter and longer catheter of DLV ports compared to temporary central venous catheters likely accounts for the differences noted. J. Clin. Apheresis 30:353–358, 2015. © 2015 Wiley Periodicals, Inc.  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