全文获取类型
收费全文 | 13720篇 |
免费 | 895篇 |
国内免费 | 27篇 |
专业分类
耳鼻咽喉 | 68篇 |
儿科学 | 531篇 |
妇产科学 | 606篇 |
基础医学 | 1544篇 |
口腔科学 | 189篇 |
临床医学 | 2478篇 |
内科学 | 2280篇 |
皮肤病学 | 152篇 |
神经病学 | 1522篇 |
特种医学 | 482篇 |
外科学 | 1277篇 |
综合类 | 142篇 |
一般理论 | 28篇 |
预防医学 | 1676篇 |
眼科学 | 203篇 |
药学 | 814篇 |
中国医学 | 9篇 |
肿瘤学 | 641篇 |
出版年
2023年 | 57篇 |
2022年 | 66篇 |
2021年 | 207篇 |
2020年 | 162篇 |
2019年 | 253篇 |
2018年 | 294篇 |
2017年 | 218篇 |
2016年 | 240篇 |
2015年 | 263篇 |
2014年 | 376篇 |
2013年 | 641篇 |
2012年 | 828篇 |
2011年 | 999篇 |
2010年 | 465篇 |
2009年 | 455篇 |
2008年 | 896篇 |
2007年 | 777篇 |
2006年 | 781篇 |
2005年 | 812篇 |
2004年 | 798篇 |
2003年 | 744篇 |
2002年 | 690篇 |
2001年 | 201篇 |
2000年 | 199篇 |
1999年 | 188篇 |
1998年 | 154篇 |
1997年 | 138篇 |
1996年 | 107篇 |
1995年 | 108篇 |
1994年 | 120篇 |
1993年 | 76篇 |
1992年 | 184篇 |
1991年 | 154篇 |
1990年 | 164篇 |
1989年 | 167篇 |
1988年 | 156篇 |
1987年 | 166篇 |
1986年 | 146篇 |
1985年 | 133篇 |
1984年 | 120篇 |
1983年 | 89篇 |
1982年 | 86篇 |
1981年 | 69篇 |
1980年 | 55篇 |
1979年 | 87篇 |
1978年 | 66篇 |
1977年 | 42篇 |
1976年 | 52篇 |
1975年 | 48篇 |
1972年 | 53篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Alexandra B. Morshed Rachel G. Tabak Cynthia D. Schwarz Debra Haire-Joshu 《Journal of nutrition education and behavior》2019,51(2):237-244
Objective
To examine whether a healthy weight intervention embedded in the Parents as Teachers (PAT) home visiting program, which was previously found to improve mothers’ body mass index (BMI) and obesity-related behaviors, changed the BMI of preschool children or maternal feeding practices.Methods
This stratified randomized trial included preschool-aged children at risk for overweight whose mothers were overweight or had obesity (n?=?179). The Healthy Eating and Active Living Taught at Home (HEALTH) intervention was based on the Diabetes Prevention Program. Differences were examined using repeated-measures mixed-ANOVA models.Results
Compared with PAT usual care, the HEALTH intervention had no effect on children's BMI or maternal feeding practices. However, combined analyses showed that children's BMI percentile decreased (P??=?.007), BMI z-scores were maintained (P??=?.19), and 3 of 8 feeding practices improved over time (P < .05).Conclusions and Implications
Additional research is needed to assess the effectiveness of PAT to prevent preschool-age obesity using rigorous designs (eg, group-randomized trials) and to identify its active components. HEALTH is ready to be scaled up to prevent maternal weight gain through embedding within the national PAT program. 相似文献2.
3.
4.
5.
Rebecca Wright Caleb Ferguson Mustafa Bodrick Hanan Balkhy Debra Jackson Patricia M. Davidson 《Journal of clinical nursing》2020,29(13-14):2723-2729
6.
7.
Debra L. Roter Richard M. Frankel Judith A. Hall David Sluyter 《Journal of general internal medicine》2006,21(1):28-34
Relationship-centered care reflects both knowing and feeling: the knowledge that physician and patient bring from their respective domains of expertise, and the physician’s and patient’s experience, expression, and perception of emotions during the medical encounter. These processes are conveyed and reciprocated in the care process through verbal and nonverbal communication. We suggest that the emotional context of care is especially related to nonverbal communication and that emotion-related communication skills, including sending and receiving nonverbal messages and emotional self-awareness, are critical elements of high-quality care. Although nonverbal behavior has received far less study than other care processes, the current review argues that it holds significance for the therapeutic relationship and influences important outcomes including satisfaction, adherence, and clinical outcomes of care. 相似文献
8.
A flow-through finite-dose diffusion cell has been designed for use in transdermal drug delivery research. The diffusion cell consists of an upper donor chamber and a lower receiver compartment through which a continuous supply of fresh solvent flows. The flow is directed to an automatic fraction collector. To validate the flow-through cell, its performance was compared directly against that of a conventional single-reservoir Franz cell. Homologous alkyl p-aminobenzoates were diffused through dimethylpolysiloxane membranes, and permeability coefficients increased with increasing chain length, reaching a plateau at the butyrate ester for both types of cells. This behavior suggests a shift from membrane-controlled diffusion to boundary layer control. Permeation of the butyrate and valerate compounds was significantly faster when the flow-through cell was used, suggesting that better mixing is obtained through the flow-through cell design. Considering the advantages offered in terms of time and labor saved through its use, the flow-through cell with automatic fraction collector appears to be a viable alternative to the conventional Franz cell. 相似文献
9.
Nurse practitioner and physician assistant practices in three HMOs: implications for future US health manpower needs.
下载免费PDF全文
![点击此处可从《American journal of public health》网站下载免费的PDF全文](/ch/ext_images/free.gif)
This study empirically examines the practices of non-physician providers (NPPs) within three large competitive health maintenance organizations (HMOs), as well as the physicians' and NPPs' views regarding the ideal role of NPPs. These roles are compared with NPP delegation patterns incorporated in the modeling methodology developed by the Graduate Medical Education National Advisory Committee (GMENAC). GMENAC recommended relatively high levels of delegation by physicians to NPPs. One of the HMO sites made use of NPPs at rates even higher than GMENAC's national ideals, while the rates at the other two were lower. The normative ideals for pediatric NPPs developed at each HMO were consistently higher than their actual roles. Concerns with acceptance and the role of NPPs are clearly no longer issues. Instead, the limits on NPP involvement appear to relate to considerations of costs, availability, and the increasing numbers of physicians competing for similar opportunities. 相似文献
10.
Because of its neurocognitive enhancing effects, Gingko biloba has emerged as amongst the most commonly used herbal products. We report a liver transplant recipient with potentially life-threatening toxicity resulting from Gingko biloba use. Seven days after a second liver transplantation for recurrent hepatitisB virus infection, subphrenic hematoma was documented in a 59-year-old Korean patient. Failure to control bleeding with CT-guided drainage necessitated exploratory laparotomy for the evacuation of a large subphrenic hematoma. Three weeks later, an episode of vitreous hemorrhage was documented. Unbeknownst to his care providers, the patient had been consuming Gingko biloba throughout the postoperative period. No further bleeding episodes occurred after the cessation of Gingko biloba use. Unrecognized use of herbal products may be associated with serious side effects and adverse clinical sequelae in transplant recipients. Given their increasing popularity, the use of herbal products should be routinely sought as part of the history in transplant recipients. 相似文献