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   2982832篇
  免费   242957篇
  国内免费   13060篇
耳鼻咽喉   40733篇
儿科学   93748篇
妇产科学   73736篇
基础医学   489003篇
口腔科学   77202篇
临床医学   271044篇
内科学   510229篇
皮肤病学   84164篇
神经病学   253935篇
特种医学   116806篇
外国民族医学   83篇
外科学   468579篇
综合类   89171篇
现状与发展   23篇
一般理论   2192篇
预防医学   254777篇
眼科学   67826篇
药学   200501篇
  22篇
中国医学   8767篇
肿瘤学   136308篇
  2022年   23028篇
  2021年   55088篇
  2020年   35079篇
  2019年   58171篇
  2018年   70972篇
  2017年   53924篇
  2016年   59244篇
  2015年   73754篇
  2014年   107984篇
  2013年   173333篇
  2012年   83077篇
  2011年   82980篇
  2010年   115323篇
  2009年   119556篇
  2008年   69349篇
  2007年   71885篇
  2006年   82417篇
  2005年   78440篇
  2004年   80146篇
  2003年   71480篇
  2002年   61284篇
  2001年   72610篇
  2000年   64140篇
  1999年   70306篇
  1998年   62162篇
  1997年   60540篇
  1996年   58200篇
  1995年   53625篇
  1994年   47632篇
  1993年   44684篇
  1992年   46859篇
  1991年   46109篇
  1990年   43763篇
  1989年   43943篇
  1988年   40763篇
  1987年   39955篇
  1986年   37800篇
  1985年   38800篇
  1984年   38478篇
  1983年   36120篇
  1982年   38007篇
  1981年   36200篇
  1980年   34279篇
  1979年   30647篇
  1978年   29444篇
  1977年   27282篇
  1976年   25427篇
  1975年   24457篇
  1974年   23794篇
  1973年   22747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