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   3321157篇
  免费   270465篇
  国内免费   13545篇
耳鼻咽喉   45079篇
儿科学   102896篇
妇产科学   84292篇
基础医学   530038篇
口腔科学   89976篇
临床医学   299303篇
内科学   578396篇
皮肤病学   90808篇
神经病学   281679篇
特种医学   131687篇
外国民族医学   225篇
外科学   514070篇
综合类   100343篇
现状与发展   34篇
一般理论   2191篇
预防医学   274220篇
眼科学   76237篇
药学   232866篇
  27篇
中国医学   9987篇
肿瘤学   160813篇
  2021年   55208篇
  2020年   35384篇
  2019年   58051篇
  2018年   71268篇
  2017年   54410篇
  2016年   60188篇
  2015年   74412篇
  2014年   108736篇
  2013年   173959篇
  2012年   88657篇
  2011年   87891篇
  2010年   116135篇
  2009年   121004篇
  2008年   74700篇
  2007年   77153篇
  2006年   88170篇
  2005年   83129篇
  2004年   84907篇
  2003年   75947篇
  2002年   65601篇
  2001年   107183篇
  2000年   99963篇
  1999年   98953篇
  1998年   65204篇
  1997年   62980篇
  1996年   60755篇
  1995年   56273篇
  1994年   50127篇
  1993年   46884篇
  1992年   68065篇
  1991年   64395篇
  1990年   61461篇
  1989年   60584篇
  1988年   55559篇
  1987年   54045篇
  1986年   51243篇
  1985年   50962篇
  1984年   46693篇
  1983年   42717篇
  1982年   40808篇
  1981年   38406篇
  1980年   36341篇
  1979年   37681篇
  1978年   33378篇
  1977年   31361篇
  1976年   28153篇
  1975年   27047篇
  1974年   27213篇
  1973年   26183篇
  1972年   24580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