全文获取类型
收费全文 | 17996篇 |
免费 | 412篇 |
国内免费 | 48篇 |
专业分类
耳鼻咽喉 | 102篇 |
儿科学 | 484篇 |
妇产科学 | 424篇 |
基础医学 | 1792篇 |
口腔科学 | 684篇 |
临床医学 | 1652篇 |
内科学 | 3341篇 |
皮肤病学 | 312篇 |
神经病学 | 1473篇 |
特种医学 | 376篇 |
外科学 | 1763篇 |
综合类 | 157篇 |
一般理论 | 2篇 |
预防医学 | 1836篇 |
眼科学 | 238篇 |
药学 | 2039篇 |
中国医学 | 192篇 |
肿瘤学 | 1589篇 |
出版年
2024年 | 66篇 |
2023年 | 1028篇 |
2022年 | 880篇 |
2021年 | 1329篇 |
2020年 | 1387篇 |
2019年 | 1593篇 |
2018年 | 1663篇 |
2017年 | 1123篇 |
2016年 | 695篇 |
2015年 | 672篇 |
2014年 | 1427篇 |
2013年 | 2531篇 |
2012年 | 502篇 |
2011年 | 390篇 |
2010年 | 347篇 |
2009年 | 352篇 |
2008年 | 391篇 |
2007年 | 335篇 |
2006年 | 186篇 |
2005年 | 241篇 |
2004年 | 172篇 |
2003年 | 125篇 |
2002年 | 125篇 |
2001年 | 111篇 |
2000年 | 88篇 |
1999年 | 56篇 |
1998年 | 44篇 |
1997年 | 54篇 |
1996年 | 37篇 |
1995年 | 12篇 |
1994年 | 22篇 |
1993年 | 12篇 |
1992年 | 15篇 |
1991年 | 10篇 |
1990年 | 12篇 |
1988年 | 9篇 |
1987年 | 8篇 |
1986年 | 9篇 |
1985年 | 64篇 |
1984年 | 52篇 |
1983年 | 45篇 |
1982年 | 50篇 |
1981年 | 37篇 |
1980年 | 34篇 |
1979年 | 25篇 |
1978年 | 22篇 |
1977年 | 10篇 |
1976年 | 14篇 |
1975年 | 13篇 |
1974年 | 17篇 |
排序方式: 共有10000条查询结果,搜索用时 27 毫秒
51.
《Alcoholism treatment quarterly》2012,30(3):326-342
This article explores and discusses the sociocultural dynamics underpinning urban African American youths' use and misuse of substances and its connection to the invisible wounds of race-related trauma. A racially-sensitive framework is discussed as an intervention approach designed to address the special needs of urban Africa American adolescents maligned by, and suffering from, the complex interplay of substance misuse and rage. 相似文献
52.
《Alcoholism treatment quarterly》2012,30(3):353-359
The use of athletics and sports with people recovering from substance abuse disorders has been well documented. Athletics has many positive advantages that lend itself to addictions treatment. This article discusses the concept of using sports to promote recovery involvement for African American youth from the viewpoint of a scholar-practitioner-athlete and a scholar-practitioner/former professional athlete. Drawing upon the addictions literature and experiences in athletics, youth programming and addictions, the authors discuss similarities between sports and recovery and address the need for more sports programming with African American youth as a supplement to traditional treatment programs. 相似文献
53.
《Alcoholism treatment quarterly》2012,30(3):315-325
For decades, tension has existed between addictions counselors and clients based upon a widely held belief by counselors that there is only one way to recover, leading to client resistance to treatment, premature termination, and relapse, as the client's approach to recovery has been commonly ignored. This article outlines multiple pathways of recovery among African American men and also offers clinical recommendations for service providers who work with these men. 相似文献
54.
《Alcoholism treatment quarterly》2012,30(3):293-306
Regrettably for African Americans, research has rarely addressed issues that affect their health and well-being. This lack of attention manifests itself in the dearth of literature available while doing literature reviews on prevention of comorbid mental illness and substance abuse (MISA) and substance use and abuse disorders in African Americans. However, there are a few studies on the prevention of substance use and abuse disorders alone and the prevention of relapse in African Americans with MISA problems. These articles form the basis of our proposal to prevent co-morbidity of mental and substance use and abuse disorders in African Americans. 相似文献
55.
Antonia‐Leda Matalas Charles E. Franti Louis E. Grivetti 《Ecology of food and nutrition》2013,52(4):381-414
The study examined differences in Greek and Greek‐American diets and disease patterns related to migration within the Mediterranean and from the Mediterranean to the United States. Data reported here discuss changes in food patterns and health‐related characteristics of two populations, both originating from the Greek island of Chios, residing either in Athens, Greece, or urban centers in the United States. Food consumption and medical history questionnaires were mailed to 2652 Chians residing in Athens, New York, and the San Francisco Bay region of California. A total of 381 usable responses were obtained; 79% of both the Chian Greek and the Chian Greek American sample were first generation emigrants. Food consumption data were analyzed as monthly frequencies of 49 food items and categories using factor analysis and discriminate analysis. Associations between location of residence and disease prevalence were examined using maximum‐likelihood logit analysis; results were controlled for age, Body Mass Index, physical activity, smoking habit, and socio‐economic status. After controlling for these potential confounders, as well as for presence of the conditions of elevated serum cholesterol, hypertension, and diabetes, Chian American men were identified at higher risk for cardiovascular disease (CVD) than their Athenian counterparts (p < 0.06). This difference in risk for CVD may be related to more frequent use of oils and fats other than olive oil, and less frequent use of olive oil. Among women, diabetes exhibited a positive association with Chian women residing in Athens (p < 0.09), which may be explained by a less frequent use of foods rich in complex carbohydrates by Athenian women than by their American counterparts. 相似文献
56.
《Occupational Therapy in Health Care》2013,27(3):206-222
ABSTRACTThe aim of this paper is to identify and synthesize evidence concerning the most widely used contemporary occupation-focused models including Ecology of human performance; Model of human occupation; Occupational adaptation; and Person–environment–occupational performance. The paper characterizes the amount and type of evidence. Evidence found includes illustrations of how the models can be applied to understand and address a particular problem or population, basic studies that test or expand theoretical concepts, psychometric studies, studies that document therapy outcomes, and studies that examine clinical reasoning and/or practice based on the models. The four models differed widely in the amount and type of evidence available. 相似文献
57.
《International journal of food sciences and nutrition》2013,64(2):170-177
Amino acids (AA) are important chemical constituents of tea leaves remarkably influencing the quality of tea. In this study, free AA and total AA in Apocynum venetum L. (Luobuma tea) were estimated by HPLC equipped with fluorescent detector using 2-[2-(7H-dibenzo[a,g]carbazol-7-yl)-ethoxy] ethyl chloroformate (DBCEEC) as a fluorescent labelling reagent. Different parameters for derivatization and separation were optimized. AA were rapidly derivatized within 3 min at room temperature with DBCEEC. In conjunction with a gradient elution, a baseline resolution of 20 analytes was achieved on a reversed-phase Hypersil BDS C18 column. LC separation for the derivatized AA showed good reproducibility. Twenty AA were detected and showed significant linear responses with correlation coefficients (>0.9992). This developed method offered the low detection limit of 2.88–23.4 fmol. 相似文献
58.
Michelle Y. O'Connor Caroline K. ThoresonNatalie L.M. Ramsey Madia RicksAnne E. Sumner 《Progress in cardiovascular diseases》2013
Vitamin D levels in people of African descent are often described as inadequate or deficient. Whether low vitamin D levels in people of African descent lead to compromised bone or cardiometabolic health is unknown. Clarity on this issue is essential because if clinically significant vitamin D deficiency is present, vitamin D supplementation is necessary. However, if vitamin D is metabolically sufficient, vitamin D supplementation could be wasteful of scarce resources and even harmful. In this review vitamin D physiology is described with a focus on issues specific to populations of African descent such as the influence of melanin on endogenous vitamin D production and lactose intolerance on the willingness of people to ingest vitamin D fortified foods. Then data on the relationship of vitamin D to bone and cardiometabolic health in people of African descent are evaluated. 相似文献
59.
60.
《Modern rheumatology / the Japan Rheumatism Association》2013,23(4):332-335
AbstractAn 18-year-old woman with a history of multiple oral ulcers followed by erythema nodosum was admitted to our hospital because of the lack of a pulse in her upper left extremity and occasional dizziness. High C-reactive protein (CRP) levels were detected in her serum. Arterial angiography showed a widespread narrowing of the major arteries, including both carotid arteries, the left vertebral artery, the left subclavian artery (branches of the aortic arch), the abdominal aorta, and left renal arteries. However, no involvement in the circle of Willis was noted, and this was confirmed by magnetic resonance angiography. Pulmonary scintigraphy showed no perfusion defect. The distribution of the arterial involvement, her youth, and nega-tive human leukocyte antigen (HLA) B51 were consistent with Takayasu arteritis, although the presence of mucocutaneous involvement favored a diagnosis of vasculo-Behçet's syndrome. We treated the patient with prednisolone and warfarin, which resulted in an improvement in CRP levels and no thrombosis-related complications. 相似文献