全文获取类型
收费全文 | 312805篇 |
免费 | 47654篇 |
国内免费 | 14782篇 |
专业分类
耳鼻咽喉 | 6494篇 |
儿科学 | 7002篇 |
妇产科学 | 3851篇 |
基础医学 | 20884篇 |
口腔科学 | 4738篇 |
临床医学 | 47997篇 |
内科学 | 69260篇 |
皮肤病学 | 9194篇 |
神经病学 | 22527篇 |
特种医学 | 12924篇 |
外国民族医学 | 93篇 |
外科学 | 58198篇 |
综合类 | 32371篇 |
现状与发展 | 122篇 |
一般理论 | 14篇 |
预防医学 | 19113篇 |
眼科学 | 7465篇 |
药学 | 18172篇 |
145篇 | |
中国医学 | 10551篇 |
肿瘤学 | 24126篇 |
出版年
2024年 | 1282篇 |
2023年 | 7160篇 |
2022年 | 7605篇 |
2021年 | 11432篇 |
2020年 | 12404篇 |
2019年 | 7326篇 |
2018年 | 12746篇 |
2017年 | 12343篇 |
2016年 | 12966篇 |
2015年 | 15823篇 |
2014年 | 24793篇 |
2013年 | 24393篇 |
2012年 | 18278篇 |
2011年 | 19484篇 |
2010年 | 20086篇 |
2009年 | 22279篇 |
2008年 | 15294篇 |
2007年 | 13136篇 |
2006年 | 15356篇 |
2005年 | 12139篇 |
2004年 | 8555篇 |
2003年 | 6917篇 |
2002年 | 6207篇 |
2001年 | 7259篇 |
2000年 | 6510篇 |
1999年 | 6677篇 |
1998年 | 5907篇 |
1997年 | 5730篇 |
1996年 | 5068篇 |
1995年 | 4816篇 |
1994年 | 3349篇 |
1993年 | 2427篇 |
1992年 | 2415篇 |
1991年 | 2251篇 |
1990年 | 1750篇 |
1989年 | 1824篇 |
1988年 | 1553篇 |
1987年 | 1324篇 |
1986年 | 1300篇 |
1985年 | 1013篇 |
1984年 | 684篇 |
1983年 | 635篇 |
1982年 | 581篇 |
1981年 | 472篇 |
1980年 | 406篇 |
1979年 | 362篇 |
1978年 | 329篇 |
1977年 | 397篇 |
1975年 | 277篇 |
1972年 | 305篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
The research and development of penicillin started with difficulty before 1949 and achieved certain results. In 1951, after the founding of the People's Republic of China, Zhang Weishen, as the only Chinese scientist who had been trained and worked in a penicillin research and development center in the United States for many years, overcame many difficulties and returned to China. In 1953, with the efforts of Zhang Weishen and his colleagues, China realized the industrialized production of penicillin, alleviating the urgent needs of the masses. Antibiotics has also become the first discipline to achieve major scientific and technological achievements after the founding of the New China. In the mid-1950s, the technical breakthrough in the localization of lactose substitutes marked the localization of the raw materials of the penicillin-producing culture medium, which paved the way for the industrialized production of penicillin with Chinese characteristics. Antibiotics have become one of the most widely used and affordable drugs for hundreds of millions of patients in China, and China has since ended the humiliating history of the “Sick Man of East Asia". 相似文献
22.
Raymond J. Chan RN PhD Vivienne E. Milch MBBS MHPol Fiona Crawford-Williams PhD Oluwaseyifunmi Andi Agbejule BRadTherapy Ria Joseph MNutrDiet Jolyn Johal BND Narayanee Dick BSc Matthew P. Wallen PhD Julie Ratcliffe PhD Anupriya Agarwal MBBS Larissa Nekhlyudov MD Matthew Tieu PhD Manaf Al-Momani BPharm Scott Turnbull PhD Rahul Sathiaraj MPH Dorothy Keefe MBBS MD Nicolas H. Hart PhD 《CA: a cancer journal for clinicians》2023,73(6):565-589
Patient navigation is a strategy for overcoming barriers to reduce disparities and to improve access and outcomes. The aim of this umbrella review was to identify, critically appraise, synthesize, and present the best available evidence to inform policy and planning regarding patient navigation across the cancer continuum. Systematic reviews examining navigation in cancer care were identified in the Cochrane Central Register of Controlled Trials (CENTRAL), PubMed, Embase, Cumulative Index of Nursing and Allied Health (CINAHL), Epistemonikos, and Prospective Register of Systematic Reviews (PROSPERO) databases and in the gray literature from January 1, 2012, to April 19, 2022. Data were screened, extracted, and appraised independently by two authors. The JBI Critical Appraisal Checklist for Systematic Review and Research Syntheses was used for quality appraisal. Emerging literature up to May 25, 2022, was also explored to capture primary research published beyond the coverage of included systematic reviews. Of the 2062 unique records identified, 61 systematic reviews were included. Fifty-four reviews were quantitative or mixed-methods reviews, reporting on the effectiveness of cancer patient navigation, including 12 reviews reporting costs or cost-effectiveness outcomes. Seven qualitative reviews explored navigation needs, barriers, and experiences. In addition, 53 primary studies published since 2021 were included. Patient navigation is effective in improving participation in cancer screening and reducing the time from screening to diagnosis and from diagnosis to treatment initiation. Emerging evidence suggests that patient navigation improves quality of life and patient satisfaction with care in the survivorship phase and reduces hospital readmission in the active treatment and survivorship care phases. Palliative care data were extremely limited. Economic evaluations from the United States suggest the potential cost-effectiveness of navigation in screening programs. 相似文献
23.
Janitz Amanda E. Schraw Jeremy M. Xu Chao Lupo Philip J. 《Cancer causes & control : CCC》2022,33(3):483-488
Cancer Causes & Control - Congenital malformations are strong risk factors for childhood cancer. Our objective was to determine whether cancer survival differs by birth defect status among... 相似文献
24.
25.
刘斌 《中国现代药物应用》2022,(3)
目的研究腹腔镜经脐单一部位幽门环肌切开术治疗小儿先天性肥厚性幽门狭窄的临床效果。方法100例小儿先天性肥厚性幽门狭窄患儿作为研究对象,按照随机方式分为观察组和对照组,每组50例。对照组采用腹腔镜幽门环肌切开术治疗,观察组采用腹腔镜经脐单一部位幽门环肌切开术治疗。观察记录患儿的手术结果及随访结果,并比较两组患儿手术时间、术后住院时间。结果手术过程顺利,100例患儿均成功完成手术,无一例中转开腹手术,无并发症发生。观察组患儿术后6 h将胃管取下,少量喂入温水后逐渐过渡到喂糖水、喂奶;对照组患儿术后24 h开始逐渐进食。患儿术后进行6个月的延续性随访,观察组患儿切口恢复美观,已经无法观察到切口瘢痕,两组患儿的生长发育均显示正常状态。观察组患儿手术时间(21.23±1.65)min及术后住院时间(5.58±1.98)d均显著短于对照组的(38.44±1.23)min、(9.67±1.22)d,差异具有统计学意义(P<0.05)。结论先天性肥厚性幽门狭窄患儿采用腹腔镜经脐单一部位幽门环肌切开术治疗,手术效果良好,手术创伤小而且安全。 相似文献
26.
27.
28.
29.