全文获取类型
收费全文 | 736596篇 |
免费 | 61968篇 |
国内免费 | 23331篇 |
专业分类
耳鼻咽喉 | 7524篇 |
儿科学 | 18634篇 |
妇产科学 | 11639篇 |
基础医学 | 102603篇 |
口腔科学 | 17469篇 |
临床医学 | 64800篇 |
内科学 | 104514篇 |
皮肤病学 | 13069篇 |
神经病学 | 46896篇 |
特种医学 | 17371篇 |
外国民族医学 | 214篇 |
外科学 | 69919篇 |
综合类 | 104450篇 |
现状与发展 | 94篇 |
一般理论 | 29篇 |
预防医学 | 49817篇 |
眼科学 | 11403篇 |
药学 | 72823篇 |
425篇 | |
中国医学 | 42896篇 |
肿瘤学 | 65306篇 |
出版年
2023年 | 11099篇 |
2022年 | 15432篇 |
2021年 | 29283篇 |
2020年 | 26166篇 |
2019年 | 31497篇 |
2018年 | 29653篇 |
2017年 | 27269篇 |
2016年 | 25023篇 |
2015年 | 26839篇 |
2014年 | 44262篇 |
2013年 | 48581篇 |
2012年 | 41645篇 |
2011年 | 46898篇 |
2010年 | 38874篇 |
2009年 | 36851篇 |
2008年 | 36178篇 |
2007年 | 35552篇 |
2006年 | 31650篇 |
2005年 | 27611篇 |
2004年 | 23761篇 |
2003年 | 20498篇 |
2002年 | 16379篇 |
2001年 | 14285篇 |
2000年 | 11958篇 |
1999年 | 10518篇 |
1998年 | 9252篇 |
1997年 | 8584篇 |
1996年 | 7462篇 |
1995年 | 6879篇 |
1994年 | 6213篇 |
1993年 | 5144篇 |
1992年 | 4613篇 |
1991年 | 4095篇 |
1990年 | 3514篇 |
1989年 | 3105篇 |
1988年 | 2837篇 |
1987年 | 2383篇 |
1986年 | 2285篇 |
1985年 | 5407篇 |
1984年 | 6351篇 |
1983年 | 4412篇 |
1982年 | 4966篇 |
1981年 | 4470篇 |
1980年 | 3945篇 |
1979年 | 3532篇 |
1978年 | 2990篇 |
1977年 | 2301篇 |
1976年 | 2498篇 |
1975年 | 1848篇 |
1974年 | 1574篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
熊磊教授以理脾为本,将治痰贯穿始终。根据小儿脾常不足、肾常虚、肝常有余的生理特点,癫痫发作期治疗主以涤痰开窍,辅以理气健脾,同时配合活血化瘀通窍与平肝息风潜阳。主要选方为柴芍温胆汤、天麻钩藤饮、桃红四物汤加减;缓解期则以补肾养肝为主,兼以健脾化痰,主要选方为杞菊地黄丸合定痫丸加减,取得较好临床疗效。 相似文献
2.
3.
《Vaccine》2022,40(52):7604-7612
Background and ObjectiveVaccine uptake during pregnancy remains low. Our objectives were to describe 1) development and adaptation of a clinician communication training intervention for maternal immunizations and 2) obstetrics and gynecology (ob-gyn) clinician and staff perspectives on the intervention and fit for the prenatal care context.MethodsDesign of the Motivational Interviewing for Maternal Immunizations (MI4MI) intervention was based on similar communication training interventions for pediatric settings and included presumptive initiation of vaccine recommendations (“You’re due for two vaccines today”) combined with motivational interviewing (MI) for hesitant patients. Interviews and focus group discussions were conducted with ob-gyn clinicians and staff in five Colorado clinics including settings with obstetric physicians, certified nurse midwives (CNMs), and clinician-trainees. Participants were asked about adapting training to the ob-gyn setting and their implementation experiences. Feedback was incorporated through iterative changes to training components.ResultsInterview and focus group discussion results from participants before (n = 3), during (n = 11) and after (n = 25) implementation guided intervention development and adaptation. Three virtual, asynchronous training components were created: a video and two interactive modules. This virtual format was favored due to challenges attending group meetings; however, participants noted opportunities to practice skills through role-play were lacking. Training modules were adapted to include common challenging vaccine conversations and live-action videos. Participants liked interactive training components and use of adult learning strategies. Some participants initially resisted the presumptive approach but later found it useful after applying it in their practices. Overall, participants reported that MI4MI training fit well with the prenatal context and recommended more inclusion of non-clinician staff.ConclusionsMI4MI training was viewed as relevant and useful for ob-gyn clinicians and staff. Suggestions included making training more interactive, and including more complex scenarios and non-clinician staff. 相似文献
4.
5.
目的 建立蒙药绿松石的质量标准。方法 收集不同产地绿松石,共10批。观察绿松石样品和粉末的性状并进行理化鉴别;按2020年版《中国药典》(四部)通则方法测定绿松石样品中水分、浸出物含量;采用原子吸收光谱法测定绿松石样品铜元素含量。结果 绿松石为不规则、周围带有黑石的块状物,表面蓝绿色,体重,质硬脆,难砸碎,断面呈贝壳状,蜡样光泽,粉末呈灰绿色,无臭,味淡;理化鉴别结果显示,呈铜盐反应;10批次样品中水分含量为0.41%-3.94%(SD=1.37%),浸出物含量为0.21%-0.81%(SD=0.21%),铜元素含量为3.03%-4.63%(SD=0.63%)。结论 初步拟定绿松石中水分含量不得超多5.0%、浸出物含量不得低于0.10%,铜元素含量应为2.60%-4.84%,制定的标准可用于蒙药材绿松石的质量控制。 相似文献
6.
7.
BackgroundTo investigate perioperative complication rates at radical nephrectomy (RN) according to inferior vena cava thrombectomy (IVC-T) status and stage (metastatic vs non-metastatic) within kidney cancer patients.Materials and methodsWe ascertained perioperative complication rates within the National Inpatient Sample database (2016–2019). First, log-link linear Generalized Estimating Equation function (GEE) regression models (adjusted for hospital clustering and weighted for discharge disposition) tested complication rates in IVC-T patients, according to metastatic stage. Subsequently, a subgroup analysis relied on RN patients with or without IVC-T. Here, multivariable logistic regression models tested complication rates in RN patients according to IVC-T status, after propensity score matching including metastatic stage.ResultsOf 26,299 RN patients, 461 (2%) patients underwent IVC-T. Of those, 252 (55%) were non-metastatic vs 209 (45%) were metastatic. Rates of acute kidney injury (AKI), transfusion, cardiac, thromboembolic and other medical complications in non-metastatic vs metastatic patients were 40 vs 40%, 25 vs 22%, 21 vs 23%, 19 vs 14% and 38 vs 40%, respectively (all p ≥ 0.2). Metastatic stage in IVC-T patients did not predict differences in complications in log-link linear GEE regression models (all p > 0.1). However, in logistic regression models with propensity score matching, relying on the overall cohort of RN patients, IVC-T status was associated with higher complication rates (all p < 0.001): AKI (Odds ratio [OR]:2.60; 95%-CI [95%-Confidence interval: 1.97–3.44), transfusions (OR:2.40; 95%-CI: 1.72–3.36), cardiac (OR:2.27; 95%-CI: 1.49–3.47), thromboembolic (OR:9.07; 95%-CI: 5.21–16.58) and other medical complications (OR:2.01; 95%-CI: 1.52–2.66).ConclusionsThe current analyses indicate that presence of concomitant IVC-T is associated with higher complication rate at RN. Conversely, metastatic stage has no effect on recorded complication rates. 相似文献
8.
9.
《Health & place》2022
PurposeAccording to the social determinants of health framework, income inequality is a potential risk factor for adverse mental health. However, few studies have explored the mechanisms suspected to mediate this relationship. The current study addresses this gap through a mediation analysis to determine if social support and community engagement act as mediators linking neighbourhood income inequality to maternal anxiety and depressive symptoms within a cohort of new mothers living in the City of Calgary, Canada.MethodsData collected at three years postpartum from mothers belonging to the All Our Families (AOF) cohort were used in the current study. Maternal data were collected between 2012 and 2015 and linked to neighbourhood socioeconomic data from the 2006 Canadian Census. Income inequality was measured using Gini coefficients derived from 2006 after-tax census data. Generalized structural equation models were used to quantify the associations between income inequality and mental health symptoms, and to assess the potential direct and indirect mediating effects of maternal social support and community engagement.ResultsIncome inequality was not significantly associated with higher depressive symptoms (β = 0.32, 95%CI = −0.067, 0.70), anxiety symptoms (β = 0.11, 95%CI = −0.39, 0.60), or lower social support. Income inequality was not associated with community engagement. For the depression models, higher social support was significantly associated with lower depressive symptoms (β = −0.13, 95%CI = −0.15, −0.097), while community engagement was not significantly associated with depressive symptoms (β = 0.059, 95%CI = −0.15, 0.27). Similarly, for the anxiety models, lower anxiety symptoms were significantly associated with higher levels of social support (β = −0.17, 95%CI = −0.20, −0.13) but not with higher levels of community engagement (β = 0.14, 95%CI = −0.14, 0.41).ConclusionThe current study did not find clear evidence for social support or community engagement mediating the relationship between neighbourhood income inequality and maternal mental health. Future investigations should employ a broader longitudinal approach to capture changes in income inequality, potential mediators, and mental health symptomatology over time. 相似文献
10.