全文获取类型
收费全文 | 20536篇 |
免费 | 1272篇 |
国内免费 | 60篇 |
专业分类
耳鼻咽喉 | 331篇 |
儿科学 | 1111篇 |
妇产科学 | 498篇 |
基础医学 | 1786篇 |
口腔科学 | 357篇 |
临床医学 | 1618篇 |
内科学 | 4922篇 |
皮肤病学 | 329篇 |
神经病学 | 1039篇 |
特种医学 | 722篇 |
外科学 | 3712篇 |
综合类 | 451篇 |
一般理论 | 4篇 |
预防医学 | 1093篇 |
眼科学 | 905篇 |
药学 | 1561篇 |
1篇 | |
中国医学 | 71篇 |
肿瘤学 | 1357篇 |
出版年
2023年 | 172篇 |
2022年 | 346篇 |
2021年 | 780篇 |
2020年 | 411篇 |
2019年 | 621篇 |
2018年 | 716篇 |
2017年 | 501篇 |
2016年 | 506篇 |
2015年 | 510篇 |
2014年 | 792篇 |
2013年 | 990篇 |
2012年 | 1501篇 |
2011年 | 1349篇 |
2010年 | 849篇 |
2009年 | 663篇 |
2008年 | 999篇 |
2007年 | 1016篇 |
2006年 | 942篇 |
2005年 | 880篇 |
2004年 | 789篇 |
2003年 | 672篇 |
2002年 | 599篇 |
2001年 | 479篇 |
2000年 | 510篇 |
1999年 | 403篇 |
1998年 | 161篇 |
1997年 | 138篇 |
1996年 | 117篇 |
1995年 | 116篇 |
1994年 | 104篇 |
1993年 | 82篇 |
1992年 | 279篇 |
1991年 | 250篇 |
1990年 | 219篇 |
1989年 | 211篇 |
1988年 | 172篇 |
1987年 | 176篇 |
1986年 | 155篇 |
1985年 | 168篇 |
1984年 | 147篇 |
1983年 | 141篇 |
1982年 | 65篇 |
1981年 | 75篇 |
1979年 | 116篇 |
1978年 | 86篇 |
1977年 | 63篇 |
1974年 | 75篇 |
1973年 | 110篇 |
1972年 | 100篇 |
1971年 | 68篇 |
排序方式: 共有10000条查询结果,搜索用时 514 毫秒
1.
2.
3.
Rohi Shah Nomaan Sheikh Jitendra Mangwani Nicolette Morgan Hamidreza Khairandish 《Journal of Clinical Orthopaedics and Trauma》2021,12(1):138
Demographic projections for hip fragility fractures indicate a rising annual incidence by virtue of a multimorbid, ageing population with more noncommunicable diseases (NCDs). NCDs are characterised by slow progression and long duration ranging from ischaemic cardiovascular disease, cerebrovascular disease, diabetes, chronic obstructive pulmonary disease to various cancers. Management of this disease burden often involves commencing patients on oral anticoagulants to reduce the risk of thromboembolic events. The use of direct oral anticoagulants (DOACs) in clinical practice has increased due to their rapid onset of action, short half-life and predictable anticoagulant effects, without the need for routine monitoring. Safe and timely surgical intervention relies on reversal of anticoagulants. However, the lack of specific evidence-based guidelines for the perioperative management of patients on DOACs with hip fractures has proved challenging; in particular, the accessibility of DOAC-specific assays, justification of the cost-benefit ratio of targeted reversal agents and indications for neuraxial anaesthesia. This has led to potentially avoidable delays in surgical intervention. Following a literature review of the pharmacokinetic and pharmacodynamics of commonly used DOACs in our region including the role of surrogate markers, we propose a systematic, evidence-based guideline to the perioperative management of hip fractures DOACs. We believe this standardised protocol can be easily replicated between hospitals. We recommend that if patients are deemed suitable for a general anaesthesia, with satisfactory renal function, optimal surgical time should be 24 h following the last ingested dose of DOAC. 相似文献
4.
5.
6.
Bryan Mclaughlin JungHwan Yang Woohyun Yoo Bret Shaw Soo Yun Kim Dhavan Shah 《Health communication》2016,31(6):762-771
The growth of online support groups has led to an expression effects paradigm within the health communication literature. Although religious support expression is characterized as a typical subdimension of emotional support, we argue that in the context of a life-threatening illness, the inclusion of a religious component creates a unique communication process. Using data from an online group for women with breast cancer, we test a theoretical expression effects model. Results demonstrate that for breast cancer patients, religious support expression has distinct effects from general emotional support messages, which highlights the need to further theorize expression effects along these lines. 相似文献
7.
Daniel J. Snyder Thomas R. Kroshus Aakash Keswani Evan B. Garden Karl M. Koenig Kevin J. Bozic David S. Jevsevar Jashvant Poeran Calin S. Moucha 《The Journal of arthroplasty》2019,34(4):613-618
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8.
9.
10.