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   3312655篇
  免费   268987篇
  国内免费   13506篇
耳鼻咽喉   44922篇
儿科学   102618篇
妇产科学   83963篇
基础医学   529663篇
口腔科学   89226篇
临床医学   297591篇
内科学   576826篇
皮肤病学   90516篇
神经病学   281015篇
特种医学   131192篇
外国民族医学   225篇
外科学   512600篇
综合类   100233篇
现状与发展   23篇
一般理论   2188篇
预防医学   273489篇
眼科学   75956篇
药学   232636篇
  27篇
中国医学   9968篇
肿瘤学   160271篇
  2021年   55026篇
  2020年   35058篇
  2019年   57926篇
  2018年   70842篇
  2017年   54009篇
  2016年   59721篇
  2015年   73969篇
  2014年   108192篇
  2013年   173311篇
  2012年   88172篇
  2011年   87365篇
  2010年   115614篇
  2009年   120377篇
  2008年   74257篇
  2007年   76733篇
  2006年   87822篇
  2005年   82841篇
  2004年   84664篇
  2003年   75740篇
  2002年   65442篇
  2001年   107063篇
  2000年   99904篇
  1999年   98827篇
  1998年   65006篇
  1997年   62828篇
  1996年   60593篇
  1995年   56156篇
  1994年   50045篇
  1993年   46802篇
  1992年   68010篇
  1991年   64358篇
  1990年   61410篇
  1989年   60530篇
  1988年   55520篇
  1987年   54007篇
  1986年   51204篇
  1985年   50931篇
  1984年   46666篇
  1983年   42686篇
  1982年   40778篇
  1981年   38379篇
  1980年   36316篇
  1979年   37668篇
  1978年   33360篇
  1977年   31342篇
  1976年   28143篇
  1975年   27036篇
  1974年   27210篇
  1973年   26176篇
  1972年   24572篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
63.
64.
65.
66.
67.
68.

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   
69.
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   

70.
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