全文获取类型
收费全文 | 7477篇 |
免费 | 667篇 |
国内免费 | 17篇 |
专业分类
耳鼻咽喉 | 82篇 |
儿科学 | 148篇 |
妇产科学 | 225篇 |
基础医学 | 1084篇 |
口腔科学 | 129篇 |
临床医学 | 788篇 |
内科学 | 1240篇 |
皮肤病学 | 109篇 |
神经病学 | 502篇 |
特种医学 | 429篇 |
外科学 | 867篇 |
综合类 | 183篇 |
一般理论 | 3篇 |
预防医学 | 763篇 |
眼科学 | 218篇 |
药学 | 501篇 |
1篇 | |
中国医学 | 23篇 |
肿瘤学 | 866篇 |
出版年
2021年 | 109篇 |
2020年 | 56篇 |
2019年 | 111篇 |
2018年 | 117篇 |
2017年 | 95篇 |
2016年 | 84篇 |
2015年 | 126篇 |
2014年 | 181篇 |
2013年 | 248篇 |
2012年 | 327篇 |
2011年 | 330篇 |
2010年 | 226篇 |
2009年 | 183篇 |
2008年 | 318篇 |
2007年 | 325篇 |
2006年 | 323篇 |
2005年 | 290篇 |
2004年 | 316篇 |
2003年 | 318篇 |
2002年 | 274篇 |
2001年 | 252篇 |
2000年 | 243篇 |
1999年 | 257篇 |
1998年 | 111篇 |
1997年 | 100篇 |
1996年 | 92篇 |
1995年 | 82篇 |
1994年 | 78篇 |
1993年 | 63篇 |
1992年 | 141篇 |
1991年 | 170篇 |
1990年 | 163篇 |
1989年 | 155篇 |
1988年 | 149篇 |
1987年 | 153篇 |
1986年 | 131篇 |
1985年 | 164篇 |
1984年 | 109篇 |
1983年 | 99篇 |
1982年 | 61篇 |
1981年 | 58篇 |
1980年 | 64篇 |
1979年 | 89篇 |
1978年 | 60篇 |
1977年 | 56篇 |
1976年 | 53篇 |
1975年 | 60篇 |
1974年 | 57篇 |
1973年 | 67篇 |
1972年 | 55篇 |
排序方式: 共有8161条查询结果,搜索用时 15 毫秒
1.
2.
Struan H. Coleman 《Arthroscopy》2019,35(4):1109-1110
Dancers have a disproportionately high prevalence of hip issues compared with other types of athletes. Many of these hip issues are complex: a cam and/or pincer impingement combined with a seemingly paradoxical borderline dysplasia, capsular laxity, and subsequent instability. Our experience as nonarthritic hip surgeons tells us that careful patient selection is critical for a successful outcome after the arthroscopic treatment of a dancer. But, there is little guidance in the literature on the management of this specific group of patients. We have studies that advise us to repair the labrum when possible versus performing labral debridement in female patients with predominantly pincer-type impingement and studies that support capsular plication and careful capsule closure in patients, predominantly female patients, with combined hip impingement and dysplasia or borderline dysplasia. However, few studies have examined predictors of outcomes after hip arthroscopy in dancers. 相似文献
3.
ABSTRACTScreening rates for trauma are low in health care settings. We examined the association between health care providers’ (HCPs) experience of physical or sexual trauma and their screening of female patients for trauma. HCPs at an urban academic medical institution were surveyed from September through November 2016. The Brief Trauma (BTQ) and Sexual and Physical Abuse History Questionnaires (SPAHQ) assessed their own experiences of trauma. The Screening Practices Questionnaire (SPQ) assessed HCPs trauma screening. Multiple regression analyses were performed. Among 212 respondents aged 22–67 years, most were female (78.3%) and white (76.1%). Nurses (41.0%) were the largest occupational group. Overall, 85.8% reported having experienced trauma. No significant difference was observed in median SPQ scores between HCPs who had experienced trauma (3.88 [Interquartile Range (IQR) 3.44–4.31]) and those who had not (4.00 [IQR 3.47–4.33], p = .645). In an adjusted model, screening policy awareness and having an obstetrics & gynecology or psychiatry specialty were associated with higher SPQ scores (p < .001). The prevalence of trauma experience in this sample was high, but not associated with screening. Screening policy awareness and practice specialty were associated with screening. HCP factors associated with greater trauma screening should be explored. 相似文献
4.
Facundo Davaro Jacob Roberts Allison May Coleman McFerrin Sameer Siddiqui Zachary Hamilton 《Journal of robotic surgery》2020,14(3):447-454
Partial nephrectomy is the mainstay of treatment for localized kidney cancer. A proportion of patients are upstaged post-operatively to locally advanced di 相似文献
5.
6.
John P Elliott Hugh S Miller Suzanne Coleman Debbie Rhea Diana Abril Karen Hallbauer Niki B Istwan Gary J Stanziano 《Journal of perinatology》2005,25(10):626-630
OBJECTIVE: To assess the impact of activity restriction (AR) on the incidence of preterm birth in women treated for preterm labor testing negative for fetal fibronectin (fFN). STUDY DESIGN: Women who were diagnosed with preterm labor and tocolyzed with magnesium sulfate were concurrently screened with fFN for the purpose of subsequent management. Included were consenting patients with negative fFN, gestational age 23 0/7-33 6/7 weeks, cervical dilation < or =3 cm, and minimal vaginal bleeding. Patients were randomized to AR or no AR. Primary study outcome was incidence of preterm delivery and interval from randomization to delivery. RESULTS: A total of 73 women with negative fFN were randomized (36 with AR, 37 without AR). The overall preterm birth rate was 40%, with 44.4% of patients with AR and 35.1% of patients without AR delivering preterm, p=0.478. CONCLUSION: Maternal AR did not impact pregnancy outcome. The incidence of preterm birth in symptomatic women testing fFN negative was higher than previously reported. 相似文献
7.
AMPK在妊娠期糖尿病发病机制中的作用 总被引:1,自引:0,他引:1
腺苷酸活化蛋白激酶是一种重要的蛋白激酶,主要作用是协调代谢和能量平衡.腺苷酸活化蛋白激酶被激活后,在增加骨骼肌对葡萄糖摄取、增强胰岛素敏感性、增加脂肪酸氧化以及调节基因转录等方面发挥重要作用.已经证实脂联素有调节糖脂代谢的作用,但其作用机制尚不十分清楚,很可能是通过腺苷酸活化蛋白激酶介导,对脂联素信号转导通路的研究将成为进一步理解脂联素作用的关键所在.而脂联素又是妊娠期糖尿病的预测因子,所以腺苷酸活化蛋白激酶逐渐成为对妊娠期糖尿病研究中的焦点. 相似文献
8.
Brian Giambattista W. W. McNairy C. G. Slough A. Johnson L. D. Bell R. V. Coleman J. Schneir R. Sonnenfeld B. Drake P. K. Hansma 《Proceedings of the National Academy of Sciences of the United States of America》1987,84(14):4671-4674
A scanning tunneling microscope (STM) can provide atomic-resolution images of solids covered with a variety of liquids, including cryogenic fluids, both polar and nonpolar solvents, conductive aqueous solutions, oils, and even greases. This short overview includes images of solids covered with liquid nitrogen, liquid helium, paraffin oil, silicone oil, microscope immersion oil, silicone vacuum grease, fluorocarbon grease, glycerol, and salt water. These images show atoms, charge-density waves, grains in an evaporated metal film, and even corrosion processes as they occur in real time. The future includes not only basic research in surface science but also applied research in lithography, lubrication, catalysis, corrosion, electrochemistry, and perhaps even biology. 相似文献
9.
10.