全文获取类型
收费全文 | 30158篇 |
免费 | 2461篇 |
国内免费 | 72篇 |
专业分类
耳鼻咽喉 | 305篇 |
儿科学 | 1003篇 |
妇产科学 | 592篇 |
基础医学 | 3893篇 |
口腔科学 | 576篇 |
临床医学 | 3499篇 |
内科学 | 6179篇 |
皮肤病学 | 354篇 |
神经病学 | 2402篇 |
特种医学 | 1165篇 |
外国民族医学 | 1篇 |
外科学 | 4062篇 |
综合类 | 622篇 |
一般理论 | 18篇 |
预防医学 | 2959篇 |
眼科学 | 1020篇 |
药学 | 2128篇 |
中国医学 | 22篇 |
肿瘤学 | 1891篇 |
出版年
2023年 | 170篇 |
2022年 | 228篇 |
2021年 | 626篇 |
2020年 | 335篇 |
2019年 | 596篇 |
2018年 | 713篇 |
2017年 | 504篇 |
2016年 | 549篇 |
2015年 | 626篇 |
2014年 | 905篇 |
2013年 | 1212篇 |
2012年 | 1799篇 |
2011年 | 1891篇 |
2010年 | 1026篇 |
2009年 | 1004篇 |
2008年 | 1675篇 |
2007年 | 1712篇 |
2006年 | 1645篇 |
2005年 | 1608篇 |
2004年 | 1559篇 |
2003年 | 1454篇 |
2002年 | 1375篇 |
2001年 | 611篇 |
2000年 | 622篇 |
1999年 | 566篇 |
1998年 | 326篇 |
1997年 | 296篇 |
1996年 | 239篇 |
1995年 | 248篇 |
1994年 | 228篇 |
1993年 | 225篇 |
1992年 | 433篇 |
1991年 | 441篇 |
1990年 | 421篇 |
1989年 | 403篇 |
1988年 | 343篇 |
1987年 | 333篇 |
1986年 | 342篇 |
1985年 | 330篇 |
1984年 | 270篇 |
1983年 | 219篇 |
1982年 | 177篇 |
1981年 | 163篇 |
1980年 | 153篇 |
1979年 | 189篇 |
1978年 | 155篇 |
1977年 | 155篇 |
1976年 | 131篇 |
1974年 | 142篇 |
1973年 | 141篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
141.
Edwards Katie M. Banyard Victoria L. Waterman Emily A. Mitchell Kimberly J. Jones Lisa M. Kollar Laura M. Mercer Hopfauf Skyler Simon Briana 《Prevention science》2022,23(8):1379-1393
Prevention Science - Involving youth in developing and implementing prevention programs to reduce sexual violence (SV) has the potential to improve prevention outcomes. However, there has been... 相似文献
142.
143.
Luis I. Ruffolo Marsha Pulhamus Theresa Foito Elizabeth Levatino Heather Martin Julie Michels Jan Schriefer Kori Wolcott Derek Wakeman 《Journal of pediatric surgery》2021,56(1):30-36
PurposePediatric gastrostomy tubes (G-tubes) are associated with considerable utilization of healthcare resources. G-tube dislodgement can result in tract disruption and abdominal sepsis. We aimed to reduce early G-tube dislodgement by 25%.MethodsAn interdisciplinary team convened to identify key drivers of G-tube dislodgement and implement initiatives to reduce this complication. A G-tube care bundle was implemented in 2018. Rates of early G-tube dislodgement (within 90 days of insertion) were tracked. 15 months of cases after bundle implementation were compared to 20 months of cases before implementation. Length of stay (LOS, balancing measure) and bundle compliance (process measure) were tracked.ResultsG-tube dislodgements decreased 47% after bundle implementation. Overall, dislodgements after G-tube insertion decreased from 43% to 19% dislodgements per tube inserted, p = 0.004. Reductions were observed for dislodgements occurring in both the inpatient (14% vs. 1.5%) and outpatient (29% vs. 18%) settings. Median LOS was reduced from 15.3 to 7.1 days following implementation, p = 0.004. Process measures demonstrated 75% or greater compliance one year after implementation.ConclusionAn interdisciplinary team using quality improvement science methodology can significantly reduce G-tube dislodgement and improve value after pediatric gastrostomy tube insertion.Type of studyLongitudinal cohort study.Level of evidenceIII. 相似文献
144.
Gordon Nicole T. Alberty-Oller Jaime J. Fei Kezhen Greco Giampaolo Gallagher Emily J. LeRoith Derek Feldman Sheldon M. Killilea Bridgid Boolbol Susan K. Choi Lydia Friedman Neil Pilewskie Melissa Port Elisa Tiersten Amy Bickell Nina A. 《Annals of surgical oncology》2021,28(11):5941-5947
Annals of Surgical Oncology - Black women with breast cancer have a worse overall survival compared with White women; however, no difference in Oncotype DX? (ODX) recurrence scores has been... 相似文献
145.
146.
147.
The RhoA/Rho kinase pathway regulates nuclear localization of serum response factor 总被引:10,自引:0,他引:10
148.
Cost studies in the long-term care field are reviewed, with emphasis on those relating to people with developmental disabilities. Studies frequently stressed the cost-effectiveness of community programs but often had significant methodological problems. Among the predominant findings in the literature were: 1) the generally lower average costs per client in community programs versus institutional programs; 2) unexplained wide cost ranges in similar community programs; and 3) significant cost shifts among federal, state, and local governments associated with deinstitutionalization initiatives. The implications of these findings for public officials and the advocacy community are discussed. 相似文献
149.
Induction of chorea and dystonia in parkinsonian primates 总被引:1,自引:0,他引:1
S Boyce C E Clarke R Luquin D Peggs R G Robertson I J Mitchell M A Sambrook A R Crossman 《Movement disorders》1990,5(1):3-7
Administration of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine in primates induced a parkinsonian syndrome that could be reversed by levodopa treatment. Animals quickly developed an apparent restlessness ("akathisia") of the lower limbs after as little as five doses. After 4-10 weeks of regular levodopa therapy, animals developed "peak dose" choreiform movements in the lower limbs that spread, with time, to involve the upper limbs and orofacial musculature. With further treatment (5-21 months), animals developed "peak dose" dystonia that variably involved the limbs and orofacial musculature. These conditions represent novel models of levodopa-induced chorea and dystonia in humans. They depend on the same underlying neuropathology and treatment regimen as their human counterparts. It is to be anticipated that these models of dyskinesia will be useful in determining the mechanisms underlying chorea and dystonia in humans and are ideally suited for experimental evaluation of new treatment strategies. 相似文献
150.
Viral hepatitis is the most common serious contagious disease caused by viruses that attack the liver. Approximately 70,000 cases are reported to the Centers for Disease Control each year, representing only a fraction of U.S. cases. There are five types of viral hepatitis currently known: Hepatitis A--formerly called infectious hepatitis; Hepatitis B--formerly called serum hepatitis, and the most serious form; Hepatitis C--formerly called non-A, non-B hepatitis; Hepatitis D--formerly called delta hepatitis; Hepatitis E--formerly called enteric or epidemic non-A, non-B hepatitis. The following Open Forum, prepared by leading EMS experts, explores the differences among the types of hepatitis, signs and symptoms, and EMS implications. 相似文献