全文获取类型
收费全文 | 73172篇 |
免费 | 6150篇 |
国内免费 | 173篇 |
专业分类
耳鼻咽喉 | 724篇 |
儿科学 | 2374篇 |
妇产科学 | 1627篇 |
基础医学 | 9105篇 |
口腔科学 | 1220篇 |
临床医学 | 9398篇 |
内科学 | 14035篇 |
皮肤病学 | 1606篇 |
神经病学 | 6791篇 |
特种医学 | 1909篇 |
外科学 | 8608篇 |
综合类 | 845篇 |
现状与发展 | 1篇 |
一般理论 | 110篇 |
预防医学 | 9498篇 |
眼科学 | 1190篇 |
药学 | 5348篇 |
中国医学 | 78篇 |
肿瘤学 | 5028篇 |
出版年
2023年 | 550篇 |
2022年 | 803篇 |
2021年 | 2144篇 |
2020年 | 1298篇 |
2019年 | 2117篇 |
2018年 | 2251篇 |
2017年 | 1722篇 |
2016年 | 1867篇 |
2015年 | 1989篇 |
2014年 | 2782篇 |
2013年 | 3789篇 |
2012年 | 5564篇 |
2011年 | 5489篇 |
2010年 | 3000篇 |
2009年 | 2536篇 |
2008年 | 4461篇 |
2007年 | 4401篇 |
2006年 | 4204篇 |
2005年 | 4014篇 |
2004年 | 3552篇 |
2003年 | 3085篇 |
2002年 | 2815篇 |
2001年 | 1181篇 |
2000年 | 1137篇 |
1999年 | 1054篇 |
1998年 | 597篇 |
1997年 | 466篇 |
1996年 | 411篇 |
1995年 | 403篇 |
1994年 | 314篇 |
1993年 | 302篇 |
1992年 | 672篇 |
1991年 | 673篇 |
1990年 | 630篇 |
1989年 | 565篇 |
1988年 | 518篇 |
1987年 | 503篇 |
1986年 | 499篇 |
1985年 | 494篇 |
1984年 | 374篇 |
1983年 | 329篇 |
1982年 | 233篇 |
1981年 | 225篇 |
1979年 | 334篇 |
1978年 | 258篇 |
1977年 | 214篇 |
1975年 | 181篇 |
1974年 | 218篇 |
1973年 | 220篇 |
1971年 | 199篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
61.
62.
63.
Clinical decisions are often made with incomplete information, yet patient care decisions are made every day. Patients vary clinically, uncertainty exists in diagnostic and prognostic information, and many preventive and treatment alternatives have not been formally assessed for their effectiveness. Because scientific information will never answer all clinical questions, clinical decisions are partially based on probabilistic information.
This paper describes how to apply clinical decision making to diagnosing and managing dental caries and periodontal diseases. By using explicit information to quantify probabilities and outcomes, clinical decision making analyzes decisions made under uncertain conditions and the uncertain impact of clinical information.
Clinical decision making incorporates concepts for preventing, diagnosing and treating dental caries and periodontal diseases: risk assessment, evidence-based dentistry, and multiple oral health outcomes. This information can serve as a tool for clinicians to augment clinical judgment and expertise. 相似文献
This paper describes how to apply clinical decision making to diagnosing and managing dental caries and periodontal diseases. By using explicit information to quantify probabilities and outcomes, clinical decision making analyzes decisions made under uncertain conditions and the uncertain impact of clinical information.
Clinical decision making incorporates concepts for preventing, diagnosing and treating dental caries and periodontal diseases: risk assessment, evidence-based dentistry, and multiple oral health outcomes. This information can serve as a tool for clinicians to augment clinical judgment and expertise. 相似文献
64.
65.
66.
Gerald T Voelbel Marsha E Bates Jennifer F Buckman Gahan Pandina Robert L Hendren 《Neuropsychopharmacology》2006,60(9):942-950
BACKGROUND: Impaired neuropsychological test performance, especially on tests of executive function and attention, is often seen in children diagnosed with autism spectrum disorders (ASD). Structures involved in fronto-striatal circuitry, such as the caudate nucleus, may support these cognitive abilities. However, few studies have examined caudate volumes specifically in children with ASD, or correlated caudate volumes to cognitive ability. METHODS: Neuropsychological test scores and caudate volumes of children with ASD were compared to those of children with bipolar disorder (BD) and of typically developing (TD) children. The relationship between test performance and caudate volumes was analyzed. RESULTS: The ASD group displayed larger right and left caudate volumes, and modest executive deficits, compared to TD controls. While caudate volume inversely predicted performance on the Wisconsin Card Sorting Test in all participants, it differentially predicted performance on measures of attention across the ASD, BD and TD groups. CONCLUSIONS: Larger caudate volumes were related to impaired problem solving. On a test of attention, larger left caudate volumes predicted increased impulsivity and more omission errors in the ASD group as compared to the TD group, however smaller volume predicted poorer discriminant responding as compared to the BD group. 相似文献
67.
Jennifer B. Gray Neal D. Gray 《International journal of mental health and addiction》2006,4(4):307-318
Some researchers speculate that as many as 10% of users worldwide suffer from “problematic” use of the internet, possibly stemming from an internet dependency. Research is in its early stages, making it an uncertain issue for mental health professionals. This paper provides: (1) a critical review of research on problematic internet use for the mental health and addictions professional; and (2) practical implications, including suggestions on treatment and prevention, given its uncertain clinical classification. 相似文献
68.
This article describes the proceedings of the 2006 Annual Meeting of the Fetal Alcohol Spectrum Disorders Study Group (FASDSG), which was held in Baltimore, Maryland on June 24, 2006. The meeting was held in conjunction with the annual meeting of the Research Society on Alcoholism and was supported by a grant from the National Institute on Alcohol Abuse and Alcoholism. The 2005-2006 FASDSG officers, Daniel J. Bonthius (President), Heather Carmichael Olson (Vice-President), and Jennifer Thomas (Secretary-Treasurer), organized the meeting. Nationally prominent speakers delivered plenary lectures on topics of newborn screening, ethics, and neuroscience. Selected members of the FASDSG provided brief scientific data (FASt) reports, describing new research findings. Representatives from national agencies involved in fetal alcohol syndrome (FAS) research, treatment, and prevention provided updates regarding priorities, funding, and agency activities. Presentations were also made by the 2006 Student Merit Award recipient and by the 2006 Rosett Award recipient. The meeting served as a forum for clinicians, neuroscientists, psychologists, social scientists, and other professionals to discuss recent advances in FAS research and to identify the most important gaps in the understanding of alcohol-induced teratology. 相似文献
69.
70.