全文获取类型
收费全文 | 710篇 |
免费 | 55篇 |
国内免费 | 67篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 53篇 |
妇产科学 | 19篇 |
基础医学 | 131篇 |
口腔科学 | 11篇 |
临床医学 | 119篇 |
内科学 | 94篇 |
皮肤病学 | 14篇 |
神经病学 | 23篇 |
特种医学 | 144篇 |
外科学 | 22篇 |
综合类 | 27篇 |
预防医学 | 70篇 |
眼科学 | 1篇 |
药学 | 77篇 |
肿瘤学 | 26篇 |
出版年
2022年 | 4篇 |
2021年 | 7篇 |
2020年 | 6篇 |
2019年 | 3篇 |
2018年 | 4篇 |
2016年 | 7篇 |
2015年 | 14篇 |
2014年 | 14篇 |
2013年 | 17篇 |
2012年 | 22篇 |
2011年 | 21篇 |
2010年 | 32篇 |
2009年 | 33篇 |
2008年 | 24篇 |
2007年 | 72篇 |
2006年 | 26篇 |
2005年 | 19篇 |
2004年 | 16篇 |
2003年 | 22篇 |
2002年 | 17篇 |
2001年 | 10篇 |
2000年 | 18篇 |
1999年 | 18篇 |
1998年 | 26篇 |
1997年 | 38篇 |
1996年 | 29篇 |
1995年 | 24篇 |
1994年 | 21篇 |
1993年 | 21篇 |
1992年 | 17篇 |
1991年 | 13篇 |
1990年 | 17篇 |
1989年 | 21篇 |
1988年 | 25篇 |
1987年 | 16篇 |
1986年 | 18篇 |
1985年 | 19篇 |
1984年 | 6篇 |
1983年 | 9篇 |
1982年 | 11篇 |
1981年 | 7篇 |
1980年 | 10篇 |
1979年 | 5篇 |
1978年 | 6篇 |
1977年 | 10篇 |
1976年 | 7篇 |
1975年 | 9篇 |
1973年 | 4篇 |
1972年 | 3篇 |
1970年 | 3篇 |
排序方式: 共有832条查询结果,搜索用时 15 毫秒
1.
Angela J. Jacques-Tiura Deborah A. Ellis April Idalski Carcone Sylvie Naar Kathryn Brogan Hartlieb Elizabeth K. Towner Thomas N. Templin K.-L. Catherine Jen 《The Journal of adolescent health》2019,64(3):355-361
Objective
Successful weight loss interventions for African-Americans adolescents are lacking. Cognitive-behavioral interventions seek to develop weight loss skills (e.g., counting calories, goal setting, managing one's environment). Little is known about how well adolescents implement such skills in their daily lives. Study aims were to (1) examine weight loss skills utilization at midpoint and end of a 6-month cognitive-behavioral/motivational interviewing weight loss sequential multiple assignment randomized trial (SMART), and (2) determine if greater skill utilization predicted weight loss at treatment end and 3 months post-treatment.Method
One hundred and eighty six African-Americans adolescents with obesity and their caregiver were first randomly assigned to complete 3 months of cognitive-behavioral and motivational interviewing family-based weight loss treatment in their home or in the research office (Phase 1). Nonresponders (i.e., those who lost < 3% of initial weight, n?=?161) were rerandomized to 3 months of continued skills training (n?=?83) or contingency management (n?=?78) for Phase 2; responders were allocated to 3 months of relapse prevention (n?=?20). Adolescents’ frequency of weight loss skills utilization was assessed via questionnaire at treatment midpoint and end.Results
Higher treatment attendance was associated with better skill utilization. Higher skill utilization was associated with more weight loss at treatment end, whereas higher baseline confidence was associated with more weight loss at follow-up.Conclusions
This study indicates the importance of attending weight loss intervention sessions to develop and strengthen weight loss skills in African-American adolescents with obesity, and strengthening confidence to use such skills for continued weight loss. 相似文献2.
3.
4.
5.
6.
7.
8.
AR Jones BSC AJP Sandison FRCS WJ Owen MS FRCS 《International journal of clinical practice》1997,51(5):294-295
Pre-clerking of all patients undergoing elective general surgical operations was introduced at our hospital in an attempt to reduce an unacceptably high operation cancellation rate. A prospective audit has been performed on the effect of this policy on the cancellation rate. Before the introduction of pre-clerking there was a marked seasonal variation in the number of patients who failed to attend for surgery, which could be explained by absence on holiday. This seasonal variation disappeared after the start of pre-clerking clinics, but there has been no reduction in the number of cancellations for medical reasons. 相似文献
9.
10.
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