全文获取类型
收费全文 | 165808篇 |
免费 | 31693篇 |
国内免费 | 2568篇 |
专业分类
耳鼻咽喉 | 5283篇 |
儿科学 | 5632篇 |
妇产科学 | 2534篇 |
基础医学 | 4775篇 |
口腔科学 | 1738篇 |
临床医学 | 27458篇 |
内科学 | 52147篇 |
皮肤病学 | 7776篇 |
神经病学 | 15646篇 |
特种医学 | 6902篇 |
外科学 | 43408篇 |
综合类 | 295篇 |
现状与发展 | 72篇 |
一般理论 | 3篇 |
预防医学 | 7264篇 |
眼科学 | 3733篇 |
药学 | 1754篇 |
中国医学 | 48篇 |
肿瘤学 | 13601篇 |
出版年
2024年 | 703篇 |
2023年 | 4926篇 |
2022年 | 1471篇 |
2021年 | 3574篇 |
2020年 | 6281篇 |
2019年 | 2535篇 |
2018年 | 7761篇 |
2017年 | 7645篇 |
2016年 | 8792篇 |
2015年 | 8792篇 |
2014年 | 15995篇 |
2013年 | 16203篇 |
2012年 | 6514篇 |
2011年 | 6661篇 |
2010年 | 11016篇 |
2009年 | 14725篇 |
2008年 | 6673篇 |
2007年 | 5061篇 |
2006年 | 7434篇 |
2005年 | 4714篇 |
2004年 | 3899篇 |
2003年 | 2810篇 |
2002年 | 2933篇 |
2001年 | 3918篇 |
2000年 | 3133篇 |
1999年 | 3347篇 |
1998年 | 3814篇 |
1997年 | 3622篇 |
1996年 | 3508篇 |
1995年 | 3305篇 |
1994年 | 2029篇 |
1993年 | 1655篇 |
1992年 | 1450篇 |
1991年 | 1463篇 |
1990年 | 1106篇 |
1989年 | 1231篇 |
1988年 | 1050篇 |
1987年 | 880篇 |
1986年 | 909篇 |
1985年 | 734篇 |
1984年 | 574篇 |
1983年 | 546篇 |
1982年 | 529篇 |
1981年 | 420篇 |
1980年 | 378篇 |
1979年 | 323篇 |
1978年 | 333篇 |
1977年 | 413篇 |
1975年 | 283篇 |
1972年 | 312篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Elizabeth A. Mosley PhD MPH Amy J. Schulz PhD MPH MSW Lisa H. Harris MD PhD Barbara A. Anderson PhD 《Women & health》2020,60(7):806-820
ABSTRACT Abortion is legal in South Africa, but negative abortion attitudes remain common and are poorly understood. We used nationally representative South African Social Attitudes Survey data to analyze abortion attitudes in the case of fetal anomaly and in the case of poverty from 2007 to 2016 (n = 20,711; ages = 16+). We measured correlations between abortion attitudes and these important predictors: religiosity, attitudes about premarital sex, attitudes about preferential hiring and promotion of women, and attitudes toward family gender roles. Abortion acceptability for poverty increased over time (b = 0.05, p < .001), but not for fetal anomaly (b = ?0.008, p = .284). Highly religious South Africans reported lower abortion acceptability in both cases (Odds Ratio (OR)anomaly = 0.85, p = .015; ORpoverty = 0.84, p = .02). Premarital sex acceptability strongly and positively predicted abortion acceptability (ORanomaly = 2.63, p < .001; ORpoverty = 2.46, p < .001). Attitudes about preferential hiring and promotion of women were not associated with abortion attitudes, but favorable attitudes about working mothers were positively associated with abortion acceptability for fetal anomaly ((ORanomaly = 1.09, p = .01; ORpoverty = 1.02, p = .641)). Results suggest negative abortion attitudes remain common in South Africa and are closely tied to religiosity, traditional ideologies about sexuality, and gender role expectations about motherhood. 相似文献
22.
23.
24.
Worsening pneumonitis due to a pharmacokinetic drug–drug interaction between everolimus and voriconazole in a renal transplant patient 下载免费PDF全文
25.
26.
27.
28.
Yosuke Homma Takashi Shiga Hiraku Funakoshi Dai Miyazaki Atsushi Sakurai Yoshio Tahara Ken Nagao Naohiro Yonemoto Arino Yaguchi Naoto Morimura 《The American journal of emergency medicine》2019,37(2):241-248
Objective
This study assessed the association between the timing of first epinephrine administration (EA) and the neurological outcomes following out-of-hospital cardiac arrests (OHCAs) with both initial shockable and non-shockable rhythms.Methods
This was a post-hoc analysis of a multicenter prospective cohort study (SOS-KANTO 2012), which registered OHCA patients in the Kanto region of Japan from January 2012 to March 2013. We included consecutive adult OHCA patients who received epinephrine. The primary result included 1-month favorable neurological outcomes defined as cerebral performance category (CPC) 1 or 2. Secondary results included 1-month survival and return of spontaneous circulation (ROSC) after arrival at the hospital. Multivariable logistic regression analysis determined the association between delay per minute of the time from call to first EA in both pre- or in-hospital settings and outcomes.Results
Of the 16,452 patients, 9344 were eligible for our analyses. In univariable analysis, the delay in EA was associated with decreased favorable neurological outcomes only when the initial rhythm was a non-shockable rhythm. In multivariable analyses, delay in EA was associated with decreased ROSC (adjusted odds ratio [OR] for one minute delay, 0.97; 95% confidence interval [CI], 0.96–0.98) and 1-month survival (adjusted OR, 0.95; 95% CI, 0.92–0.97) when the initial rhythm was a non-shockable rhythm, whereas during a shockable rhythm, delay in EA was not associated with decreased ROSC and 1-month survival.Conclusions
While assessing the effectiveness of epinephrine for OHCA, we should consider the time-limited effects of epinephrine. Additionally, consideration of early EA based on the pathophysiology is needed. 相似文献29.
Oliver Sartor MD Daniel Heinrich MD Neil Mariados MD Maria José Méndez Vidal MD Daniel Keizman MD Camilla Thellenberg Karlsson MD Avivit Peer MD Giuseppe Procopio MD Stephen J. Frank MD Kalevi Pulkkanen MD Eli Rosenbaum MD Stefano Severi MD José Trigo MD Lucia Trandafir MD Volker Wagner MD Rui Li MS Luke T. Nordquist MD 《The Prostate》2019,79(14):1683-1691