全文获取类型
收费全文 | 20223篇 |
免费 | 1529篇 |
国内免费 | 106篇 |
专业分类
耳鼻咽喉 | 171篇 |
儿科学 | 706篇 |
妇产科学 | 545篇 |
基础医学 | 2993篇 |
口腔科学 | 315篇 |
临床医学 | 2327篇 |
内科学 | 3986篇 |
皮肤病学 | 618篇 |
神经病学 | 1958篇 |
特种医学 | 671篇 |
外科学 | 1917篇 |
综合类 | 197篇 |
一般理论 | 20篇 |
预防医学 | 2235篇 |
眼科学 | 352篇 |
药学 | 1212篇 |
中国医学 | 37篇 |
肿瘤学 | 1598篇 |
出版年
2024年 | 42篇 |
2023年 | 280篇 |
2022年 | 506篇 |
2021年 | 972篇 |
2020年 | 590篇 |
2019年 | 773篇 |
2018年 | 843篇 |
2017年 | 635篇 |
2016年 | 718篇 |
2015年 | 736篇 |
2014年 | 892篇 |
2013年 | 1166篇 |
2012年 | 1665篇 |
2011年 | 1691篇 |
2010年 | 891篇 |
2009年 | 786篇 |
2008年 | 1166篇 |
2007年 | 1193篇 |
2006年 | 1012篇 |
2005年 | 999篇 |
2004年 | 891篇 |
2003年 | 789篇 |
2002年 | 687篇 |
2001年 | 121篇 |
2000年 | 93篇 |
1999年 | 119篇 |
1998年 | 175篇 |
1997年 | 157篇 |
1996年 | 124篇 |
1995年 | 114篇 |
1994年 | 105篇 |
1993年 | 83篇 |
1992年 | 55篇 |
1991年 | 67篇 |
1990年 | 62篇 |
1989年 | 51篇 |
1988年 | 70篇 |
1987年 | 48篇 |
1986年 | 40篇 |
1985年 | 60篇 |
1984年 | 38篇 |
1983年 | 30篇 |
1982年 | 28篇 |
1981年 | 38篇 |
1980年 | 29篇 |
1979年 | 24篇 |
1978年 | 34篇 |
1977年 | 18篇 |
1976年 | 28篇 |
1973年 | 13篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Victoria L. Parker Matthew C. Winter John A. Tidy Barry W. Hancock Julia E. Palmer Naveed Sarwar Baljeet Kaur Katie McDonald Xianne Aguiar Kamaljit Singh Nick Unsworth Imran Jabbar Allan A. Pacey Robert F. Harrison Michael J. Seckl 《International journal of cancer. Journal international du cancer》2023,152(5):986-997
Gestational trophoblastic neoplasia (GTN) patients are treated according to the eight-variable International Federation of Gynaecology and Obstetrics (FIGO) scoring system, that aims to predict first-line single-agent chemotherapy resistance. FIGO is imperfect with one-third of low-risk patients developing disease resistance to first-line single-agent chemotherapy. We aimed to generate simplified models that improve upon FIGO. Logistic regression (LR) and multilayer perceptron (MLP) modelling (n = 4191) generated six models (M1-6). M1, all eight FIGO variables (scored data); M2, all eight FIGO variables (scored and raw data); M3, nonimaging variables (scored data); M4, nonimaging variables (scored and raw data); M5, imaging variables (scored data); and M6, pretreatment hCG (raw data) + imaging variables (scored data). Performance was compared to FIGO using true and false positive rates, positive and negative predictive values, diagnostic odds ratio, receiver operating characteristic (ROC) curves, Bland-Altman calibration plots, decision curve analysis and contingency tables. M1-6 were calibrated and outperformed FIGO on true positive rate and positive predictive value. Using LR and MLP, M1, M2 and M4 generated small improvements to the ROC curve and decision curve analysis. M3, M5 and M6 matched FIGO or performed less well. Compared to FIGO, most (excluding LR M4 and MLP M5) had significant discordance in patient classification (McNemar's test P < .05); 55-112 undertreated, 46-206 overtreated. Statistical modelling yielded only small gains over FIGO performance, arising through recategorisation of treatment-resistant patients, with a significant proportion of under/overtreatment as the available data have been used a priori to allocate primary chemotherapy. Streamlining FIGO should now be the focus. 相似文献
2.
3.
4.
5.
6.
Katherine Quinn Julia Dickson-Gomez Jeffrey A. Kelly 《Culture, health & sexuality》2016,18(5):524-537
In the USA, the Black Church is among the most important institutions in the Black community, offering numerous spiritual, social and health benefits. Yet, the presence of homonegativity in many Black Churches may mitigate those effects for gay Black youth. This research examines the role of the Church in the lives of gay and bisexual Black youth to understand how they reconcile any tension between their religious and sexual identities. Through interviews with pastors of Black churches (n = 21) and young Black men who have sex with men (n = 30), we explored homonegativity and young men’s experiences within the Black Church. Findings reveal that despite the prevalence of homonegativity within Black churches, religious involvement remains important for young men and many remain involved in non-affirming churches. The importance of the Church for young men stems from their significant involvement as youth and the integration of religion, family and community. Young men may not be able to leave their religious homes as readily as other gay youth given the cultural relevance of the Church. As a result, young men made attempts to conceal their sexuality in church to avoid shame and gossip and find opportunities to balance their sexuality and religiosity. 相似文献
7.
Elissa A. Adame Ryan S. Bisel Edward S. Kosik Julia A. Rygaard 《Health communication》2019,34(6):638-643
An essential piece of anesthesiologist training is attending resident feedback sessions. Yet, few attending anesthesiologists have formal teaching education and little time to acquire it. In this field experiment, attending physicians were randomly assigned to a control group or to receive 30 minutes of feedback training inspired by Implicit Person Theory (IPT). As such, IPT training encouraged physicians to praise process-oriented learning while discouraging performance-oriented mindsets. Attending physicians then observed residents participate in a human patient simulation (HPS) activity and provided residents with feedback. Content and statistical analyses revealed trained attending physicians praised learning goals and challenged performance goals more often than untrained physicians during feedback sessions. Thus, the training provides a rapid method of enhancing the quality of attending physicians’ training communication. 相似文献
8.
Julia H. Vermylen Gordon J. Wood Elaine R. Cohen Jeffrey H. Barsuk William C. McGaghie Diane B. Wayne 《Journal of pain and symptom management》2019,57(3):682-687
Introduction
Physician communication impacts patient outcomes. However, communication skills, especially around difficult conversations, remain suboptimal, and there is no clear way to determine the validity of entrustment decisions. The aims of this study were to 1) describe the development of a simulation-based mastery learning (SBML) curriculum for breaking bad news (BBN) conversation skills and 2) set a defensible minimum passing standard (MPS) to ensure uniform skill acquisition among learners.Innovation
An SBML BBN curriculum was developed for fourth-year medical students. An assessment tool was created to evaluate the acquisition of skills involved in a BBN conversation. Pilot testing was completed to confirm improvement in skill acquisition and set the MPS.Outcomes
A BBN assessment tool containing a 15-item checklist and six scaled items was developed. Students' checklist performance improved significantly at post-test compared to baseline (mean 65.33%, SD = 12.09% vs mean 88.67%, SD = 9.45%, P < 0.001). Students were also significantly more likely to have at least a score of 4 (on a five-point scale) for the six scaled questions at post-test. The MPS was set at 80%, requiring a score of 12 items on the checklist and at least 4 of 5 for each scaled item. Using the MPS, 30% of students would require additional training after post-testing.Comments
We developed a SBML curriculum with a comprehensive assessment of BBN skills and a defensible competency standard. Future efforts will expand the mastery model to larger cohorts and assess the impact of rigorous education on patient care outcomes. 相似文献9.