全文获取类型
收费全文 | 99528篇 |
免费 | 29262篇 |
国内免费 | 1121篇 |
专业分类
耳鼻咽喉 | 2412篇 |
儿科学 | 2685篇 |
妇产科学 | 2364篇 |
基础医学 | 2535篇 |
口腔科学 | 5122篇 |
临床医学 | 25884篇 |
内科学 | 25219篇 |
皮肤病学 | 3328篇 |
神经病学 | 12124篇 |
特种医学 | 3832篇 |
外科学 | 18387篇 |
综合类 | 113篇 |
现状与发展 | 40篇 |
预防医学 | 13206篇 |
眼科学 | 2109篇 |
药学 | 1115篇 |
中国医学 | 13篇 |
肿瘤学 | 9423篇 |
出版年
2024年 | 745篇 |
2023年 | 5077篇 |
2022年 | 1174篇 |
2021年 | 2850篇 |
2020年 | 5386篇 |
2019年 | 2109篇 |
2018年 | 6999篇 |
2017年 | 7384篇 |
2016年 | 7978篇 |
2015年 | 8066篇 |
2014年 | 10511篇 |
2013年 | 12213篇 |
2012年 | 3864篇 |
2011年 | 3619篇 |
2010年 | 6858篇 |
2009年 | 9142篇 |
2008年 | 3540篇 |
2007年 | 2459篇 |
2006年 | 3614篇 |
2005年 | 2237篇 |
2004年 | 1580篇 |
2003年 | 1241篇 |
2002年 | 1128篇 |
2001年 | 1815篇 |
2000年 | 1138篇 |
1999年 | 1684篇 |
1998年 | 2092篇 |
1997年 | 1919篇 |
1996年 | 1961篇 |
1995年 | 1699篇 |
1994年 | 1090篇 |
1993年 | 918篇 |
1992年 | 742篇 |
1991年 | 634篇 |
1990年 | 510篇 |
1989年 | 521篇 |
1988年 | 502篇 |
1987年 | 376篇 |
1986年 | 359篇 |
1985年 | 293篇 |
1984年 | 252篇 |
1983年 | 295篇 |
1982年 | 224篇 |
1981年 | 196篇 |
1980年 | 122篇 |
1978年 | 122篇 |
1977年 | 119篇 |
1976年 | 84篇 |
1974年 | 71篇 |
1972年 | 70篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
Depressive Symptoms and Associated Factors in Children With Attention Deficit Hyperactivity Disorder
Nancy LeBlanc PhD RN Diane Morin PhD RN 《Journal of child and adolescent psychiatric nursing》2004,17(2):49-55
PROBLEM: To compare depressive symptoms in children with attention deficit hyperactivity disorder (ADHD) to those in healthy children, and to explore the influence of individual and family factors on level of depression. METHODS: Individual interviews with 68 children, ages 7 to 12 years, in order to complete the Children's Depression Inventory. FINDINGS: Children with ADHD reported significantly more depressive symptoms than did children without ADHD; 14.7% of children with ADHD reached the threshold of a 19 point score, which suggests clinical depression. No significant effects of individual and family factors on level of depression were found. CONCLUSIONS: Children with ADHD are more inclined to experience depressive symptoms than are healthy children. To plan appropriate interventions, nurses evaluating and working with children with ADHD should always consider a possible coexistence of depressive symptoms. 相似文献
122.
123.
Paul D. Mintz MD President AABB John D. Roback MD PhD Chairman NBF Grants Review Committee 《Transfusion》2005,45(S2):23S-23S
124.
Neslihan Eminkahyagil DDS MSc PhD ; Selim Erkut DDS PhD 《Journal of prosthodontics》2006,15(5):316-320
Immediate chairside replacement of an extracted anterior tooth may contribute to a patient's comfort, treatment acceptance, and expectations of treatment; however, fabrication of a custom restoration in the anterior region of the mouth may result in an esthetic compromise for patients during the fabrication period. Chairside tooth replacement is an excellent application of fiber-reinforced composite resin technology. This article presents an innovative, affordable chairside procedure in which Ribbond Multi-Purpose Bondable Reinforcement Ribbon is used to replace a single extracted anterior tooth using the patient's own tooth. 相似文献
125.
126.
127.
128.
Jessica Swoboda DDS H. Asuman Kiyak MA PhD Rigmor E. Persson DDS MSD G. Rutger Persson DDS PhD David K. Yamaguchi PhD Michael I. MacEntee LDS FRCD© PhD Christopher C.L. Wyatt BSc DMD MSc 《Special care in dentistry》2006,26(4):137-144
There is limited information regarding oral health status and other predictors of oral health‐related quality of life. An association between oral health status and perceived oral health‐related quality of life (OHQOL) might help clinicians motivate patients to prevent oral diseases and improve the outcome of some dental public health programs. This study evaluated the relationship between older persons' OHQOL and their functional dentition, caries, periodontal status, chronic diseases, and some demographic characteristics. A group of 733 low‐income elders (mean age 72.7 ISD=4.71, 55.6% women, 55.1% members of ethnic minority groups in the U.S. and Canada) enrolled in the TEETH clinical trial were interviewed and examined as part of their fifth annual visit for the trial. OHQOL was measured by the Geriatric Oral Health Assessment Index (GOHAI); oral health and occlusal status by clinical exams and the Eichner Index; and demographics via interviews. Elders who completed the four‐year assessment had an average of 21.5 teeth (SD=6.9). with 8.5 occluding pairs (SD=4.6), and 32% with occlusal contacts in all four occluding zones. Stepwise multiple regressions were conducted to predict total GOHAI and its subscores (Physical, Social, and Worry). Functional dentition was a less significant predictor than ethnicity and being foreign‐bom. These variables, together with gender, years since immigrating, number of carious roots, and periodontal status, could predict 32% of the variance in total GOHAI, 24% in Physical, 27% in Social, and 21 % in the Worry subscales. These findings suggest that functional dentition and caries influence older adults' OHQOL, but that ethnicity and immigrant status play a larger role. 相似文献
129.
130.
Modulation of cytokine production from an EpiOcular corneal cell culture model in response to Staphylococcus aureus superantigen 总被引:3,自引:0,他引:3
A Thakur PhD A Clegg MSc A Chauhan MSc MDP Willcox PhD 《Clinical & experimental ophthalmology》1997,25(4):43-45
The present study investigated the hypothesis that Staphylococcus aureus enterotoxin B (SEE) produces epithelial cell death and releases inflammatory cytokines that produce stromal infiltration during contact lens induced peripheral ulceration. Epithelial cells were incubated with different doses of SEB for various time periods. Culture supernatants were assayed for cytokines IL- lo, IL-6 and chemotactic agents IL-8 and LTB,. SEE induced the production of IL- I p and IL-8. Epithelial cells exposed for longer periods (48 h) with low concentrations of SEB produced significantly higher levels (N0.02) of IL-Ip and IL-8 (P<0.05) compared t o a 24 h exposure. SEB did not induce the production o f IL-6 and 相似文献