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   6725篇
  免费   552篇
  国内免费   18篇
耳鼻咽喉   68篇
儿科学   188篇
妇产科学   154篇
基础医学   886篇
口腔科学   66篇
临床医学   818篇
内科学   1245篇
皮肤病学   143篇
神经病学   847篇
特种医学   112篇
外科学   780篇
综合类   65篇
一般理论   9篇
预防医学   743篇
眼科学   145篇
药学   516篇
中国医学   6篇
肿瘤学   504篇
  2024年   15篇
  2023年   141篇
  2022年   175篇
  2021年   398篇
  2020年   204篇
  2019年   319篇
  2018年   324篇
  2017年   218篇
  2016年   281篇
  2015年   285篇
  2014年   345篇
  2013年   404篇
  2012年   633篇
  2011年   602篇
  2010年   290篇
  2009年   267篇
  2008年   405篇
  2007年   393篇
  2006年   381篇
  2005年   315篇
  2004年   281篇
  2003年   214篇
  2002年   189篇
  2001年   19篇
  2000年   22篇
  1999年   12篇
  1998年   19篇
  1997年   21篇
  1996年   11篇
  1995年   12篇
  1994年   8篇
  1993年   8篇
  1992年   9篇
  1991年   9篇
  1990年   7篇
  1989年   2篇
  1987年   2篇
  1986年   3篇
  1985年   3篇
  1984年   5篇
  1983年   4篇
  1982年   6篇
  1981年   5篇
  1980年   6篇
  1975年   3篇
  1974年   5篇
  1972年   2篇
  1964年   2篇
  1963年   2篇
  1925年   1篇
排序方式: 共有7295条查询结果,搜索用时 15 毫秒
61.
62.
Malnutrition is one of the most frequent metabolic challenges in the population of chronically ill patients. This results in increased administration of nutritional therapy in inpatient settings, which poses the risk of side effects, in particular, the development of refeeding syndrome. If not managed accordingly, it leads to a significant rise in morbidity and mortality. However, despite its importance, evidence-based recommendations on the management of refeeding syndrome are largely lacking, and only a few randomized controlled trials have been conducted. In light of this, the aim of this review is to raise awareness of refeeding syndrome in chronically ill patients by critically reviewing recent literature and providing a short overview as well as diagnosis and treatment algorithms of this underreported metabolic condition. In summary, recent findings suggest undergoing risk assessment and stratification for every patient receiving nutritional therapy. According to this, adaptation of energy and fluid support during the replenishment phase should be implemented in the nutritional therapy for patients at high risk. Additionally, continuous monitoring should take place, and appropriate actions should be initiated when necessary.  相似文献   
63.
Overall survival rates for pediatric patients with high‐risk or relapsed rhabdomyosarcoma (RMS) have not improved significantly since the 1980s. Recent studies have identified a number of targetable vulnerabilities in RMS, but these discoveries have infrequently translated into clinical trials. We propose streamlining the process by which agents are selected for clinical evaluation in RMS. We believe that strong consideration should be given to the development of combination therapies that add biologically targeted agents to conventional cytotoxic drugs. One example of this type of combination is the addition of the WEE1 inhibitor AZD1775 to the conventional cytotoxic chemotherapeutics, vincristine and irinotecan.  相似文献   
64.
65.
66.
BackgroundInequitable follow-up of abnormal cancer screening tests may contribute to racial/ethnic disparities in colon and breast cancer outcomes. However, few multi-site studies have examined follow-up of abnormal cancer screening tests and it is unknown if racial/ethnic disparities exist.ObjectiveThis report describes patterns of performance on follow-up of abnormal colon and breast cancer screening tests and explores the extent to which racial/ethnic disparities exist in public hospital systems.DesignWe conducted a retrospective cohort study using data from five California public hospital systems. We used multivariable robust Poisson regression analyses to examine whether patient-level factors or site predicted receipt of follow-up test.Main MeasuresUsing data from five public hospital systems between July 2015 and June 2017, we assessed follow-up of two screening results: (1) colonoscopy after positive fecal immunochemical tests (FIT) and (2) tissue biopsy within 21 days after a BIRADS 4/5 mammogram.Key ResultsOf 4132 abnormal FITs, 1736 (42%) received a follow-up colonoscopy. Older age, Medicaid insurance, lack of insurance, English language, and site were negatively associated with follow-up colonoscopy, while Hispanic ethnicity and Asian race were positively associated with follow-up colonoscopy. Of 1702 BIRADS 4/5 mammograms, 1082 (64%) received a timely biopsy; only site was associated with timely follow-up biopsy.ConclusionDespite the vulnerabilities of public-hospital-system patients, follow-up of abnormal cancer screening tests occurs at rates similar to that of patients in other healthcare settings, with colon cancer screening test follow-up occurring at lower rates than follow-up of breast cancer screening tests. Site-level factors have larger, more consistent impact on follow-up rates than patient sociodemographic traits. Resources are needed to identify health system–level factors, such as test follow-up processes or data infrastructure, that improve abnormal cancer screening test follow-up so that effective health system–level interventions can be evaluated and disseminated.Supplementary InformationThe online version contains supplementary material available at 10.1007/s11606-022-07657-4.KEY WORDS: safety-net system, cancer screening, colon cancer, breast cancer, cancer disparities  相似文献   
67.
ObjectiveTo develop a lossless distributed algorithm for generalized linear mixed model (GLMM) with application to privacy-preserving hospital profiling.Materials and MethodsThe GLMM is often fitted to implement hospital profiling, using clinical or administrative claims data. Due to individual patient data (IPD) privacy regulations and the computational complexity of GLMM, a distributed algorithm for hospital profiling is needed. We develop a novel distributed penalized quasi-likelihood (dPQL) algorithm to fit GLMM when only aggregated data, rather than IPD, can be shared across hospitals. We also show that the standardized mortality rates, which are often reported as the results of hospital profiling, can also be calculated distributively without sharing IPD. We demonstrate the applicability of the proposed dPQL algorithm by ranking 929 hospitals for coronavirus disease 2019 (COVID-19) mortality or referral to hospice that have been previously studied.ResultsThe proposed dPQL algorithm is mathematically proven to be lossless, that is, it obtains identical results as if IPD were pooled from all hospitals. In the example of hospital profiling regarding COVID-19 mortality, the dPQL algorithm reached convergence with only 5 iterations, and the estimation of fixed effects, random effects, and mortality rates were identical to that of the PQL from pooled data.ConclusionThe dPQL algorithm is lossless, privacy-preserving and fast-converging for fitting GLMM. It provides an extremely suitable and convenient distributed approach for hospital profiling.  相似文献   
68.
Cancer pain and psychosocial factors: a critical review of the literature   总被引:7,自引:0,他引:7  
Poor pain assessment is cited as one barrier to the adequate treatment of cancer pain. The identification of relevant psychosocial factors may improve the assessment of chronic cancer pain. This article presents: 1) a critical review of the evidence for an association between chronic cancer pain and psychological distress, social support, and coping; 2) clinical implications of the findings; and 3) recommendations for future research. Fourteen of the 19 reviewed studies on psychological distress found a significant association between increased pain and increased distress. Seven of the eight studies on social support found significant association between higher levels of pain and decreased levels of social activities and social support. Three of the four studies that examined coping strategies found that increased catastrophizing was significantly associated with more intense pain. Based on several criteria, the evidence is considered Strong for psychological distress, Moderate for social support, and Inconclusive for coping. This review suggests that comprehensive chronic pain assessment should include routine screening for psychological distress.  相似文献   
69.
A 41-year-old man presented to the emergency department complaining of decrease of vision in his left eye. Initial examination was consistent with retrobulbar optic neuritis, and an intravenous drip of methylprednisolone was started. On the third day, the fundus examination revealed the appearance of multiple Purtscher-like cotton-wool spots in the posterior pole and nasally to the optic disc, slight retinal whitening around the fovea, and cherry-red spot. The patient reported flu-like symptoms, and he tested positive at PCR (polymerase chain reaction) test for 2019-nCoV (2019 novel coronavirus) infection. Assuming possible 2019-nCoV-related vascular damage, we prescribed low-molecular-weight heparin. The lesions were regressing at follow-up, and we registered a complete visual recovery.  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