全文获取类型
收费全文 | 8705篇 |
免费 | 736篇 |
国内免费 | 17篇 |
专业分类
耳鼻咽喉 | 367篇 |
儿科学 | 264篇 |
妇产科学 | 229篇 |
基础医学 | 1033篇 |
口腔科学 | 155篇 |
临床医学 | 786篇 |
内科学 | 1835篇 |
皮肤病学 | 146篇 |
神经病学 | 1100篇 |
特种医学 | 418篇 |
外科学 | 1031篇 |
综合类 | 160篇 |
一般理论 | 10篇 |
预防医学 | 667篇 |
眼科学 | 126篇 |
药学 | 614篇 |
中国医学 | 5篇 |
肿瘤学 | 512篇 |
出版年
2021年 | 94篇 |
2020年 | 58篇 |
2019年 | 91篇 |
2018年 | 127篇 |
2017年 | 93篇 |
2016年 | 101篇 |
2015年 | 127篇 |
2014年 | 153篇 |
2013年 | 257篇 |
2012年 | 311篇 |
2011年 | 369篇 |
2010年 | 239篇 |
2009年 | 220篇 |
2008年 | 336篇 |
2007年 | 379篇 |
2006年 | 361篇 |
2005年 | 378篇 |
2004年 | 353篇 |
2003年 | 334篇 |
2002年 | 288篇 |
2001年 | 294篇 |
2000年 | 351篇 |
1999年 | 292篇 |
1998年 | 161篇 |
1997年 | 147篇 |
1996年 | 119篇 |
1995年 | 121篇 |
1994年 | 94篇 |
1993年 | 92篇 |
1992年 | 201篇 |
1991年 | 169篇 |
1990年 | 220篇 |
1989年 | 202篇 |
1988年 | 217篇 |
1987年 | 203篇 |
1986年 | 200篇 |
1985年 | 173篇 |
1984年 | 125篇 |
1983年 | 114篇 |
1982年 | 75篇 |
1981年 | 89篇 |
1980年 | 69篇 |
1979年 | 107篇 |
1978年 | 77篇 |
1977年 | 77篇 |
1976年 | 55篇 |
1975年 | 76篇 |
1974年 | 57篇 |
1973年 | 62篇 |
1972年 | 58篇 |
排序方式: 共有9458条查询结果,搜索用时 15 毫秒
51.
52.
Reginald G Smart Mark Asbridge Robert E Mann Edward M Adlaf 《Revue canadienne de psychiatrie》2003,48(10):681-688
OBJECTIVE: To investigate the relation between psychiatric distress and road rage, paying particular attention to the potential link between psychiatric illness and frequent involvement in serious forms of road rage. METHOD: This study reports data on road rage involvement, demographic characteristics, and mental health for a representative sample of 2610 adults in Ontario. The mental health indicator was the 12-item General Health Questionnaire. RESULTS: A cluster analysis revealed 5 distinct groups of people affected by road rage. The most serious offenders (referred to hereafter as the hard core road rage group), representing 5.5% of those affected, exhibited frequent involvement in the most severe forms of road rage and were the most likely (27.5%) to report psychiatric distress. CONCLUSIONS: Road rage, particularly experiences of victimization, is related to psychiatric distress. Evidence of psychiatric distress was highest among hard core road rage perpetrators, individuals noted for frequent involvement in serious aggressive and violent conduct. Further research is needed on violence and road rage and its link to mental health. 相似文献
53.
54.
G J Mann 《Health care management review》1988,13(4):43-48
The successful implementation of a new information system is heavily dependent on the cooperation of the personnel involved. A recent study found that positive attitudes and intentions were related to high growth needs, group norms favoring the change, and considerate leadership styles of managers. 相似文献
55.
D Simeon B Stanley A Frances J J Mann R Winchel M Stanley 《The American journal of psychiatry》1992,149(2):221-226
OBJECTIVE: The goal of this study was to determine whether self-mutilators with personality disorders differ from nonmutilators with personality disorders in impulsivity, aggression, and other psychopathology and whether serotonergic dysfunction contributes to self-mutilation. METHOD: Twenty-six self-mutilators with personality disorders were matched to 26 control subjects with personality disorders for gender, age, education, axis I diagnosis of affective disorder, and axis II diagnosis of personality disorder. Numerous indexes of psychopathology as well as CSF 5-hydroxyindoleacetic acid (5-HIAA) levels and platelet imipramine binding sites (Bmax) and affinity (Kd) were determined. RESULTS: Self-mutilators had significantly more severe character pathology, had greater lifetime aggression, and were more antisocial than the control subjects. The self-mutilators scored higher on the Hamilton Rating Scale for Depression but not on the Beck Depression Inventory or the Beck Hopelessness Scale. The two groups did not differ on the Buss-Durkee Hostility and Guilt Inventory or on the Sensation Seeking Scale. The degree of self-mutilation was significantly correlated with impulsivity, chronic anger, and somatic anxiety. Both self-mutilation and impulsivity showed significant negative correlations with Bmax, although the two groups did not differ in CSF 5-HIAA levels or in platelet imipramine binding. CONCLUSIONS: The results demonstrate the contribution of severe character pathology, aggression, impulsivity, anxiety, and anger to self-mutilation and provide preliminary support for the hypothesis of underlying serotonergic dysfunction facilitating self-mutilation. 相似文献
56.
The purpose of this study was to compare the attitudes toward basic sciences of students in a preclinical problem-based curriculum and a conventional lecture-based curriculum at the end of their second year of medical school. The results showed that the PBL class had more positive attitudes toward basic sciences than students in the conventional class. These results may reflect a learning environment where students meet many scientist role models as teachers and where basic science is learnt in the context of clinical problems. 相似文献
57.
58.
59.
Ryohei Kuwatsuru David M. Shames Andreas Mühler Jan Mintorovitch Vladimir Vexler Jeffry S. Mann Frederic Cohn David Price John Huberty Robert C. Brasch M.D. 《Magnetic resonance in medicine》1993,30(1):76-81
Magnetic resonance imaging enhanced with a macromolecular contrast medium (MMCM), albumin-Gd-DTPA, was used to estimate the plasma volume in vivo in the myocardium, lung, liver, and skeletal muscle of 10 normal rats. The plasma volumes of the same tissues in a parallel group of six rats were estimated in vitro by a conventional radioisotopic technique (111In-transferrin). Plasma volumes of myocardium, lung, liver, and skeletal muscle estimated by the MR technique (μl plas. ia cc-1 of tissue) were 101,109,163, and 11.0, respectively, while plasma volumes measured by the In-transferrin radioisotope technique (mg plasma g-1 of tissue) were 78.6, 215,143, and 11-2, respectively. Assuming a ratio of densities of aerated lung to blood of 0.45 and of other tissues to blood of 1.0, correlation between the methods was excellent (R2 = 0.99) indicating that MR imaging enhanced with MMCM permits reliable in vivo estimation of tissue plasma volume in the rat. 相似文献
60.
Berbaum KS; el-Khoury GY; Franken EA Jr; Kathol M; Montgomery WJ; Hesson W 《Radiology》1988,168(2):507-511
The effect of knowledge of localizing symptoms and signs in the detection of fractures was studied. Forty radiographs of the extremities were examined twice by seven radiologists; the sessions were separated by 4 months. In 26 cases, a subtle fracture was present; 14 cases were normal. In half of the cases at each session, the precise location of pain, tenderness, or swelling was provided. The observer was asked to determine if the case was normal or abnormal (provide the exact location of the fracture) and to indicate the degree of confidence in the diagnosis. Responses were converted to a numeric scale for analysis. Analysis of receiver operator characteristic parameters indicates that clues regarding location of trauma facilitate detection of fractures. The improvement is based largely on an increased true-positive rate without an increased false-positive rate, regardless of the decision criteria of the radiologist (overall willingness to "overread" or "underread"). This has direct clinical applicability and reinforces the plea of radiologists for precise clinical information. 相似文献