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   4393928篇
  免费   337128篇
  国内免费   15468篇
耳鼻咽喉   59465篇
儿科学   137727篇
妇产科学   114492篇
基础医学   670164篇
口腔科学   121111篇
临床医学   400463篇
内科学   788093篇
皮肤病学   110518篇
神经病学   362819篇
特种医学   171196篇
外国民族医学   456篇
外科学   668278篇
综合类   127487篇
现状与发展   23篇
一般理论   2641篇
预防医学   359760篇
眼科学   104512篇
药学   311766篇
  31篇
中国医学   12822篇
肿瘤学   222700篇
  2021年   56882篇
  2020年   36146篇
  2019年   59351篇
  2018年   75167篇
  2017年   57496篇
  2016年   63750篇
  2015年   76870篇
  2014年   111442篇
  2013年   177465篇
  2012年   125382篇
  2011年   130913篇
  2010年   127428篇
  2009年   128204篇
  2008年   115933篇
  2007年   123582篇
  2006年   131513篇
  2005年   126160篇
  2004年   127036篇
  2003年   116469篇
  2002年   105325篇
  2001年   169000篇
  2000年   163947篇
  1999年   149762篇
  1998年   72517篇
  1997年   67998篇
  1996年   65839篇
  1995年   61344篇
  1994年   55141篇
  1993年   51271篇
  1992年   106809篇
  1991年   102127篇
  1990年   97950篇
  1989年   95471篇
  1988年   87485篇
  1987年   85230篇
  1986年   80885篇
  1985年   79108篇
  1984年   66054篇
  1983年   58871篇
  1982年   47454篇
  1981年   44177篇
  1980年   41519篇
  1979年   55828篇
  1978年   45038篇
  1977年   40968篇
  1976年   37280篇
  1975年   37299篇
  1974年   40392篇
  1973年   38907篇
  1972年   36309篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
61.
ABSTRACT

A monocausal bacteriological understanding of infectious disease orients tuberculosis control efforts towards antimicrobial interventions. A bias towards technological solutions can leave multistranded public health and social interventions largely neglected. In the context of globalising biomedical approaches to infectious disease control, this ethnography-inspired review article reflects upon the implementation of rapid diagnostic technology in low- and middle-income countries. Fieldwork observations in Vietnam provided a stimulus for a critical review of the global rollout of tuberculosis diagnostic technology. To address local needs in tuberculosis control, health managers in resource-poor settings are readily cooperating with international donors to deploy novel diagnostic technologies throughout national tuberculosis programme facilities. Increasing investment in new diagnostic technologies is predicated on the supposition that these interventions will ameliorate disease outcomes. However, suboptimal treatment control persists even when accurate diagnostic technologies are available, suggesting that promotion of singular technological solutions can distract from addressing systemic change, without which disease susceptibility, propagation of infection, detection gaps, diagnostic delays, and treatment shortfalls persist.  相似文献   
62.
63.
64.
65.
66.
67.
68.
69.

Background

Nursing Home Compare (NHC) ratings, created and maintained by Medicare, are used by both hospitals and consumers to aid in the skilled nursing facility (SNF) selection process. To date, no studies have linked NHC ratings to actual episode-based outcomes. The purpose of this study was to evaluate whether NHC ratings are valid predictors of 90-day complications, readmission, and bundle costs for patients discharged to an SNF after primary total joint arthroplasty (TJA).

Methods

All SNF-discharged primary TJA cases in 2017 at a multihospital academic health system were queried. Demographic, psychosocial, and clinical variables were manually extracted from the health record. Medicare NHC ratings were then collected for each SNF. For patients in the Medicare bundle, postacute and total bundle cost was extracted from claims.

Results

Four hundred eighty-eight patients were discharged to a total of 105 unique SNFs. In multivariate analysis, overall NHC rating was not predictive of 90-day readmission/major complications, >75th percentile postacute cost, or 90-day bundle cost exceeding the target price. SNF health inspection and quality measure ratings were also not predictive of 90-day readmission/major complications or bundle performance. A higher SNF staffing rating was independently associated with a decreased odds for >75th percentile 90-day postacute spend (odds ratio, 0.58; P = .01) and a 90-day bundle cost exceeding the target price (odds ratio = 0.69; P = .02) but was similarly not predictive of 90-day readmission/complications.

Conclusion

Results of our study suggest that Medicare's NHC tool is not a useful predictor of 90-day costs, complications, or readmissions for SNFs within our health system.  相似文献   
70.
Purpose/aim: To focus on current aspects of primary thyroid lymphoma (PTL), which is a rare clinical entity usually manifested by a rapidly growing mass in the neck that can cause pressure symptoms.

Materials and Methods: Relevant papers in PubMed published through June 2017 were selected to track updated information about PTL with an emphasis on diagnosis and novel therapeutic management.

Results: The most frequent cases include non-Hodgkin lymphoma derived from B-cells, mainly diffuse large B-cell lymphoma (DLBCL) followed by mucosa-associated lymphoid tissue (MALT) lymphoma or a mixed type. Other subtypes are less common. Lymphomas derived from T-cells and Hodgkin lymphomas are extremely rare. Hashimoto's autoimmune thyroiditis has been implicated as a risk factor for lymphoma. At the molecular level, the Wnt5a protein and its receptor Ror2 are involved in the course of the disease. Ultrasonography, fine needle aspiration (FNA) biopsy, and core or open biopsy combined with new diagnostic facilities contribute to an accurate diagnosis. An increased potential exists for a cure without the need for a radical surgical procedure. Modern chemoradiation therapy plus the monoclonal antibody rituximab, which acts against CD20, have limited the need for surgical interventions and provide an excellent outcome in most cases. However, some cases have resulted in treatment failure or recurrence.

Conclusions: A multidisciplinary approach must be used to define the management policy in each case. Future efforts by researchers are likely to be focused on the molecular level.  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