全文获取类型
收费全文 | 1942篇 |
免费 | 139篇 |
国内免费 | 24篇 |
专业分类
耳鼻咽喉 | 10篇 |
儿科学 | 76篇 |
妇产科学 | 63篇 |
基础医学 | 296篇 |
口腔科学 | 45篇 |
临床医学 | 211篇 |
内科学 | 371篇 |
皮肤病学 | 29篇 |
神经病学 | 107篇 |
特种医学 | 164篇 |
外科学 | 212篇 |
综合类 | 51篇 |
预防医学 | 149篇 |
眼科学 | 39篇 |
药学 | 128篇 |
中国医学 | 25篇 |
肿瘤学 | 129篇 |
出版年
2023年 | 31篇 |
2022年 | 82篇 |
2021年 | 102篇 |
2020年 | 81篇 |
2019年 | 82篇 |
2018年 | 100篇 |
2017年 | 75篇 |
2016年 | 75篇 |
2015年 | 90篇 |
2014年 | 102篇 |
2013年 | 119篇 |
2012年 | 135篇 |
2011年 | 133篇 |
2010年 | 82篇 |
2009年 | 73篇 |
2008年 | 80篇 |
2007年 | 75篇 |
2006年 | 53篇 |
2005年 | 38篇 |
2004年 | 22篇 |
2003年 | 17篇 |
2002年 | 21篇 |
2001年 | 16篇 |
2000年 | 10篇 |
1999年 | 19篇 |
1998年 | 34篇 |
1997年 | 42篇 |
1996年 | 35篇 |
1995年 | 18篇 |
1994年 | 19篇 |
1993年 | 19篇 |
1992年 | 4篇 |
1991年 | 19篇 |
1990年 | 22篇 |
1989年 | 27篇 |
1988年 | 18篇 |
1987年 | 12篇 |
1986年 | 13篇 |
1985年 | 11篇 |
1984年 | 7篇 |
1983年 | 12篇 |
1982年 | 8篇 |
1981年 | 4篇 |
1980年 | 15篇 |
1977年 | 8篇 |
1976年 | 7篇 |
1975年 | 6篇 |
1971年 | 4篇 |
1969年 | 3篇 |
1967年 | 7篇 |
排序方式: 共有2105条查询结果,搜索用时 15 毫秒
21.
Breast cancer is the most common malignancy among women and the second leading cause of mortality due to cancer worldwide. The complexity of breast cancer resembles an intricate ecosystem comprising various cleverly designed interaction levels of internal and external factors to generate a pliable context in the clonal evolution of breast cancer cells. Principally, the complex entity can become evident toward delineating a number of significant variations in the specific fields of breast cancer analyses, including the molecular, physiological, and morphological characteristics, clinical presentations, risk factors, the histopathological conditions, and response to systemic therapy regarding the maintenance of tumor as a whole. In hindsight, various classification systems developing based on specific inclusion criteria have indisputably changed both our appreciation of the biological demeanor of breast cancer and the main strategies for designing tailored therapy regimens through the proper evaluation of diagnosis and prognostication of given specimens. Here, we endeavor to provide a general overview of different types of breast cancer classification as well as the clinical acceptance of their applications along with the latest findings in this area. Taken together, the major significance of breast cancer management that can be ascertained by operational convergent points of its stratification areas is owing to the fact that the achievement of individualized and targeted therapy may denounce new horizons of surveillance and treatment strategies in which they may function as a rheostat of specific therapy regimens toward reducing the detected distances between experimental data and operating options in clinical practice. 相似文献
22.
Zufan Yegezu Lea Mollon Dhafer Mahdi Alshayban Jawad Bilal Sandipan Bhattacharjee 《Research in social & administrative pharmacy》2021,17(2):307-314
BackgroundAccording to the American College of Cardiology/the American Heart Association (ACC/AHA) recommendations, health-related risk behaviors for secondary prevention of myocardial infarction (MI) are critical to determine.ObjectiveThis study aimed to compare health-related risk behaviors between MI survivors and propensity-score-matched non-MI controls using nationally representative data.MethodsThis cross-sectional, matched case-control study used publicly available Behavioral Risk Factor Surveillance System (BRFSS) 2017 data. Older adults with MI were propensity-score-matched to their non-MI controls. The 10 dependent variables included body mass index (BMI), smoking status, heavy alcohol consumption, influenza vaccine, length of time since last routine and cholesterol checkup, alcohol consumption, fruit and vegetable consumption, and physical activity. Chi-square tests and binomial logistic regression were used to examine the health-related risk behaviors differences between MI survivors and propensity-score-matched non-MI controls.ResultsThe final study sample consisted of 18,021 MI survivors and 54,063 non-MI controls after propensity score matching. Multivariable logistic regression analysis showed significant differences between MI survivors and matched non-MI controls in terms of cholesterol checkup, smoking status, and alcohol consumption. For example, multivariate analysis of health-related risk behaviors showed MI survivors were more likely to be smokers (AOR = 1.46, 95% CI: 1.28–1.68).ConclusionBased on this national survey of adults, MI survivors were more likely to be smokers but less likely to consume alcohol compared to their propensity-score-matched controls. Moreover, MI survivors were more likely to have their cholesterol checkup within the past 2 years compared to matched non-MI controls. Although lower alcohol consumption and greater chances of cholesterol checkups are reassuring health-related behaviors, interventions are needed to minimize the chances of smoking in this population. 相似文献
23.
Amy Mahdi Melanie Dembinsky Katie Bristow 《Journal of psychosomatic obstetrics and gynaecology》2013,34(4):250-263
Introduction: Poor maternal mental health during the perinatal period has been shown to have potentially long-lasting effects for mother and child. In recognition of this, maternal mental health is receiving increased attention from political and healthcare organizations, with a growing focus on preventing the onset of common mental health disorders.Objective: The objective for this review is to provide an update of randomized controlled trials examining the use of interventions targeted to prevent the onset of postnatal depression and anxiety in nondiagnostic populations with universal or selected samples.Methods: A total of four databases, EBSCO Host, Science Direct, Scopus, and Web of Science, incorporating PsychINFO were searched and papers selected according to clearly specified inclusion criteria. A large Health Technology review was published in 2016, for which the final search was conducted in December 2012. Therefore inclusion criteria were studies published from January 2013 onwards, available in English language, had a focus on prevention of postnatal maternal depression and anxiety, and used psychological interventions. Drug intervention trials were excluded.Findings: 12 studies were identified as examining antenatal or postnatal intervention trials with an aim of preventing maternal postnatal depression and/or anxiety. There continues to be limited evidence to recommend specific prevention strategies for universal samples without further testing. There is evidence to suggest the use of rational-emotive behavioral therapy in an antenatal sample may have some utility, and the use of psychotherapy-based interventions in a postnatal setting is also supported although both require further investigation. Additionally, there is a need to gather information on acceptability, as many trials were hindered by poor adherence to interventions and high attrition that were otherwise unexplained. 相似文献
24.
In the present study, the microscopy and polymerase chain reaction methods were used for detection and identification of soil contamination by Toxocara eggs in squares, streets, public parks, and rubbish dumps in Ahvaz, southwestern Iran. 相似文献
25.
26.
27.
Acoustic manipulation of porous spherical shells, widely used as drug delivery carriers and magnetic resonance imaging contrast agents, is investigated analytically. The technique used for this purpose is based on the application of high-order Bessel beams as a single-beam acoustic manipulation device, by which particles lying on the axis of the beam can be pulled toward the beam source. The exerted acoustic radiation force is calculated using the standard partial-wave series method, and the wave propagation within the porous media is modeled using Biot's theory of poro-elasticity. Numerical simulations are performed for porous aluminum and silica shells of different thickness and porosity. Results indicate that manipulation of low-porosity shells is possible using Bessel beams with large conical angles, over a number of broadband frequency ranges, whereas manipulation of highly porous shells can occur over both narrowband and broadband frequency domains. 相似文献
28.
29.
Akbari Mohammadarian Eshghyar Fatemeh Gholipour Mahdi Eslami Solat Hussen Bashdar Mahmud Taheri Mohammad Omrani Mir Davood Ghafouri-Fard Soudeh 《Metabolic brain disease》2022,37(6):2061-2066
Metabolic Brain Disease - mTOR has been shown to be involved in the regulation of immune responses and differentiation of immune cells. This protein is a candidate molecule for unraveling the... 相似文献
30.