全文获取类型
| 收费全文 | 1616755篇 |
| 免费 | 132847篇 |
| 国内免费 | 2592篇 |
专业分类
| 耳鼻咽喉 | 21773篇 |
| 儿科学 | 53468篇 |
| 妇产科学 | 46617篇 |
| 基础医学 | 229950篇 |
| 口腔科学 | 47583篇 |
| 临床医学 | 142694篇 |
| 内科学 | 317150篇 |
| 皮肤病学 | 34319篇 |
| 神经病学 | 131243篇 |
| 特种医学 | 65215篇 |
| 外国民族医学 | 476篇 |
| 外科学 | 245702篇 |
| 综合类 | 39996篇 |
| 现状与发展 | 3篇 |
| 一般理论 | 565篇 |
| 预防医学 | 124904篇 |
| 眼科学 | 36755篇 |
| 药学 | 122403篇 |
| 3篇 | |
| 中国医学 | 3060篇 |
| 肿瘤学 | 88315篇 |
出版年
| 2018年 | 15038篇 |
| 2016年 | 13096篇 |
| 2015年 | 15259篇 |
| 2014年 | 20953篇 |
| 2013年 | 31832篇 |
| 2012年 | 43251篇 |
| 2011年 | 45486篇 |
| 2010年 | 26768篇 |
| 2009年 | 25697篇 |
| 2008年 | 43625篇 |
| 2007年 | 45954篇 |
| 2006年 | 46790篇 |
| 2005年 | 45378篇 |
| 2004年 | 44739篇 |
| 2003年 | 42819篇 |
| 2002年 | 41922篇 |
| 2001年 | 76172篇 |
| 2000年 | 78831篇 |
| 1999年 | 66829篇 |
| 1998年 | 17949篇 |
| 1997年 | 16512篇 |
| 1996年 | 16488篇 |
| 1995年 | 16175篇 |
| 1994年 | 15227篇 |
| 1993年 | 14343篇 |
| 1992年 | 55764篇 |
| 1991年 | 54079篇 |
| 1990年 | 52828篇 |
| 1989年 | 51081篇 |
| 1988年 | 47434篇 |
| 1987年 | 46803篇 |
| 1986年 | 44526篇 |
| 1985年 | 43057篇 |
| 1984年 | 32213篇 |
| 1983年 | 27721篇 |
| 1982年 | 16277篇 |
| 1981年 | 14569篇 |
| 1980年 | 13685篇 |
| 1979年 | 30632篇 |
| 1978年 | 21207篇 |
| 1977年 | 17877篇 |
| 1976年 | 16791篇 |
| 1975年 | 17670篇 |
| 1974年 | 21612篇 |
| 1973年 | 20779篇 |
| 1972年 | 18968篇 |
| 1971年 | 17865篇 |
| 1970年 | 16386篇 |
| 1969年 | 15355篇 |
| 1968年 | 14028篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
71.
72.
W. Do T. Elzerman R. de Bree A. Rosenberg T. Forouzanfar E.M. Van Cann 《International journal of oral and maxillofacial surgery》2021,50(5):591-597
The aim of this study was to analyse the effect of body mass index (BMI), both low and high values, on the perioperative complication rate in patients with oral squamous cell carcinoma (OSCC). The medical records of 259 patients operated between 2014 and 2017 for OSCC were reviewed. Univariate and multivariate analyses were performed. Sixty of the 259 patients developed 87 complications. Low or high BMI was not associated with the perioperative complication rate. A longer operating time and increased blood loss were associated with a higher perioperative complication rate and higher Clavien–Dindo grade. Low BMI, American Society of Anesthesiologists score 2 and 3, a longer operating time, and increased blood loss were associated with a longer hospital stay. Low BMI was associated with a longer hospital stay. Neither low nor high BMI was associated with the perioperative complication rate. A longer operating time and increased blood loss were associated with a higher perioperative complication rate and higher Clavien–Dindo grade. 相似文献
73.
74.
75.
76.
Clint R. Bellenger John B. Arnold Jonathan D. Buckley Dominic Thewlis Joel T. Fuller 《Journal of Science and Medicine in Sport》2019,22(3):294-299
Objectives
To investigate whether functional overreaching affects locomotor system behaviour when running at fixed relative intensities and if any effects were associated with changes in running performance.Design
Prospective intervention study.Methods
Ten trained male runners completed three training blocks in a fixed order. Training consisted of one week of light training (baseline), two weeks of heavy training designed to induce functional overreaching, and ten days of light taper training designed to allow athletes to recover from, and adapt to, the heavy training. Locomotor behaviour, 5-km time trial performance, and subjective reports of training status (Daily Analysis of Life Demands for Athletes (DALDA) questionnaire) were assessed at the completion of each training block. Locomotor behaviour was assessed using detrended fluctuation analysis of stride intervals during running at speeds corresponding to 65% and 85% of maximum heart rate (HRmax) at baseline.Results
Time trial performance (effect size ±95% confidence interval (ES): 0.16 ± 0.06; p < 0.001), locomotor behaviour at 65% HRmax (ES: ?1.12 ± 0.95; p = 0.026), and DALDA (ES: 2.55 ± 0.80; p < 0.001) were all detrimentally affected by the heavy training. Time trial performance improved relative to baseline after the taper (ES: ?0.16 ± 0.10; p = 0.003) but locomotor behaviour at 65% HRmax (ES: ?1.18 ± 1.17; p = 0.048) and DALDA (ES: 0.92 ± 0.90; p = 0.045) remained impaired.Conclusions
Locomotor behaviour during running at 65% HRmax was impaired by functional overreaching and remained impaired after a 10-day taper, despite improved running performance. Locomotor changes may increase injury risk and should be considered within athlete monitoring programs independently of performance changes. 相似文献77.
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78.
79.
M. Iachina P.M. Ljungdalh R.G. Sørensen L. Kaerlev J. Blaakær O. Trosko N. Qvist B.M. Nørgård 《Clinical oncology (Royal College of Radiologists (Great Britain))》2019,31(2):115-123