全文获取类型
收费全文 | 2769篇 |
免费 | 149篇 |
国内免费 | 9篇 |
专业分类
耳鼻咽喉 | 35篇 |
儿科学 | 73篇 |
妇产科学 | 54篇 |
基础医学 | 245篇 |
口腔科学 | 48篇 |
临床医学 | 262篇 |
内科学 | 392篇 |
皮肤病学 | 48篇 |
神经病学 | 207篇 |
特种医学 | 33篇 |
外科学 | 179篇 |
综合类 | 645篇 |
一般理论 | 2篇 |
预防医学 | 275篇 |
眼科学 | 44篇 |
药学 | 182篇 |
中国医学 | 1篇 |
肿瘤学 | 202篇 |
出版年
2023年 | 23篇 |
2022年 | 39篇 |
2021年 | 51篇 |
2020年 | 47篇 |
2019年 | 60篇 |
2018年 | 64篇 |
2017年 | 62篇 |
2016年 | 54篇 |
2015年 | 71篇 |
2014年 | 88篇 |
2013年 | 128篇 |
2012年 | 146篇 |
2011年 | 153篇 |
2010年 | 109篇 |
2009年 | 87篇 |
2008年 | 214篇 |
2007年 | 269篇 |
2006年 | 224篇 |
2005年 | 220篇 |
2004年 | 171篇 |
2003年 | 139篇 |
2002年 | 127篇 |
2001年 | 55篇 |
2000年 | 57篇 |
1999年 | 59篇 |
1998年 | 60篇 |
1997年 | 19篇 |
1996年 | 6篇 |
1995年 | 10篇 |
1994年 | 8篇 |
1993年 | 10篇 |
1992年 | 10篇 |
1990年 | 7篇 |
1989年 | 3篇 |
1988年 | 8篇 |
1986年 | 2篇 |
1985年 | 3篇 |
1984年 | 8篇 |
1983年 | 2篇 |
1982年 | 5篇 |
1981年 | 7篇 |
1980年 | 5篇 |
1979年 | 5篇 |
1978年 | 3篇 |
1977年 | 3篇 |
1976年 | 3篇 |
1967年 | 2篇 |
1966年 | 2篇 |
1927年 | 2篇 |
1909年 | 2篇 |
排序方式: 共有2927条查询结果,搜索用时 15 毫秒
71.
Harry Prapavessis Stefanie De Jesus Therese Harper Anita Cramp Lyndsay Fitzgeorge Michelle F. Mottola Michael Ussher Guy Faulkner Peter Selby 《Addictive behaviors》2014
Introduction
Smoking during pregnancy is common, and quitting at any point during pregnancy can yield benefits to both the fetus and mother. Smoking cessation is typically followed by withdrawal symptoms and a strong desire to smoke, both of which are likely to contribute to relapse. Research has shown that a bout of exercise minimizes cravings and tobacco withdrawal symptoms (TWS) after temporary abstinence in smokers, but these findings have not been replicated in pregnant smokers. This study examined the effect of 20 min of exercise on cravings (primary outcome) and TWS (secondary outcomes) among temporary abstinent, inactive pregnant smokers.Methods
Thirty female smokers (Mean(M) age = 25.7 years, Standard Deviation(SD) = 5.5; M weeks pregnant = 18.2, SD = 5.3; Fagerstrom Test for Cigarette Dependence = 3.3, SD = 2.2; M 9.3 cigarettes/day, SD = 4.7; M hours abstained = 17.2, SD = 2.8) were randomized to 20 min of mild-to-moderate intensity exercise (EC; n = 14) or passive (PC; n = 16) condition. Cravings and TWS were assessed immediately before, during (at 10 min), immediately post, and at 10, 20, and 30 min post-condition.Results
A 2 (condition) × 6 (time) repeated measures ANOVA revealed that the EC significantly (p < 0.05) reduced cravings (?2 = 0.46) compared with the PC, across time. Non-significant, but nevertheless, large effects were evident favouring the EC over time for TWS restlessness (?2 = 0.34), stress (?2 = 0.24), irritability (?2 = 0.21), tension (?2 = 0.15), and depression (?2 = 0.14).Conclusions
Consistent with previous research, this study reveals that in pregnant smokers, a bout of exercise is associated with a reduction in cravings and similar patterns exist for TWS. Therefore, exercise may have the potential to assist in the initial stages of smoking cessation attempts during pregnancy. 相似文献72.
73.
74.
75.
76.
77.
78.
Mo Therese Hannah 《Journal of clinical psychology》1993,49(5):622-637
This study generated an empirical, statistically based typology that used both symptom data and social functioning dimensions to define subtypes of seriously mentally ill patients. The intent of using social functioning information was to explore the degree to which it improves clinicians' understanding of and treatment planning for diverse subgroups of patients. Social functioning dimensions and symptom data collected on a group of SPMI (seriously and persistently mentally ill) patients were factor analyzed and then submitted to a cluster analysis that yielded five meaningful patient subtypes. Demonstrations of the usefulness of this classification included significant subgroup differences on clinically important external variables, including needs for specific types of treatment and service consumption. For comparison purposes, the failure of the DSM-III diagnostic classification to distinguish patients on the clinically relevant criteria also was demonstrated. 相似文献
79.
Used the SCL-90 Analogue to rate nine psychiatric syndromes-and overall psychopathology in 1,046 mental health and 809 substance abuse patients admitted to a large metropolitan, community mental health center. Stepwise multiple regressions of the nine syndrome ratings on the global psychopathology ratings for each sample indicated that different syndromes contributed meaningful amounts of variance to the explanations of the global psychopathology ratings. The salient syndromes for the mental health patients were Interpersonal Sensitivity and Psychoticism, whereas those for the substance abuse patients were Anxiety and Paranoid Ideation. Implications of the results for the wisdom of averaging syndrome ratings to calculate overall psychopathology were discussed. 相似文献
80.
Johannes Hofer Andreas R. Janecke L.B. Zimmerhackl Magdalena Riedl Alejandra Rosales Thomas Giner Gerard Cortina Carola J. Haindl Barbara Petzelberger Miriam Pawlik Verena Jeller Udo Vester Bettina Gadner Michael van Husen Michael L. Moritz Reinhard Würzner Therese Jungraithmayr for the German-Austrian HUS Study Group 《Clinical journal of the American Society of Nephrology》2013,8(3):407-415