全文获取类型
收费全文 | 22289篇 |
免费 | 1865篇 |
国内免费 | 38篇 |
专业分类
耳鼻咽喉 | 236篇 |
儿科学 | 838篇 |
妇产科学 | 593篇 |
基础医学 | 2930篇 |
口腔科学 | 315篇 |
临床医学 | 3074篇 |
内科学 | 4250篇 |
皮肤病学 | 235篇 |
神经病学 | 2119篇 |
特种医学 | 501篇 |
外科学 | 2480篇 |
综合类 | 315篇 |
一般理论 | 23篇 |
预防医学 | 2910篇 |
眼科学 | 456篇 |
药学 | 1231篇 |
中国医学 | 16篇 |
肿瘤学 | 1670篇 |
出版年
2023年 | 164篇 |
2022年 | 266篇 |
2021年 | 650篇 |
2020年 | 398篇 |
2019年 | 607篇 |
2018年 | 637篇 |
2017年 | 499篇 |
2016年 | 516篇 |
2015年 | 543篇 |
2014年 | 730篇 |
2013年 | 1126篇 |
2012年 | 1516篇 |
2011年 | 1700篇 |
2010年 | 856篇 |
2009年 | 746篇 |
2008年 | 1320篇 |
2007年 | 1352篇 |
2006年 | 1297篇 |
2005年 | 1182篇 |
2004年 | 1024篇 |
2003年 | 1046篇 |
2002年 | 905篇 |
2001年 | 323篇 |
2000年 | 361篇 |
1999年 | 317篇 |
1998年 | 224篇 |
1997年 | 176篇 |
1996年 | 149篇 |
1995年 | 148篇 |
1994年 | 150篇 |
1993年 | 130篇 |
1992年 | 233篇 |
1991年 | 227篇 |
1990年 | 180篇 |
1989年 | 199篇 |
1988年 | 193篇 |
1987年 | 201篇 |
1986年 | 167篇 |
1985年 | 189篇 |
1984年 | 139篇 |
1983年 | 104篇 |
1982年 | 89篇 |
1981年 | 105篇 |
1980年 | 94篇 |
1979年 | 111篇 |
1978年 | 100篇 |
1976年 | 72篇 |
1973年 | 69篇 |
1972年 | 64篇 |
1971年 | 66篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
1.
2.
Timothy J. Cordingley Mark A.G. Wilson Kathryn M. Weston 《Health & social care in the community》2022,30(1):353-359
Vaccination is a vital health care initiative to prevent individual and population infection. To increase vaccination rates the federal government implemented the ‘No Jab, No Pay’ policy, where eligibility for several government benefits required children to be fully vaccinated by removing ‘conscientious objections’ and expanding the age range of children whose families receive benefits. This study assesses the impact of this policy at a local area within a single medical practice community in NSW, Australia. A retrospective clinical audit was performed between 2012 and 2017 on a single general practice's vaccination records for children ≤19 years. Catch-up vaccinations were assessed based on age at vaccination. Incidence of catch-up vaccinations was assessed for each of four years before and two years after the implementation of the ‘No Jab, No Pay’ policy in January 2016, along with the age of children and vaccination(s) given. Catch-up vaccinations were assessed temporally either side of implementation of ‘No Jab, No Pay’. Comparing the average annual vaccination catch-up incidence rate of 6.2% pre-implementation (2012–2015), there was an increase to 9.2% in 2016 (p < .001) and 7.8% in 2017 (p = .027). Secondary outcome measurement of catch-up vaccination incidence rates before (2012–2015) and after (2016–2017) ‘No Jab, No Pay’ implementation showed statistically significant increases for children aged 8–11 years (3.2%–5.6%, p = .038), 12–15 years (7.5%–14.7%, p < .001) and 16–19 years (3.3%–10.2%, p < .001) along with a statistically significant reduction in children aged 1–3 years (11.4%–6.2%, p = .015). Also, catch-up rates for DTPa significantly increased after program implementation. This study demonstrates that the Australian federal government vaccination policy ‘No Jab, No Pay’ was coincident with an increase in catch-up vaccinations within a rural NSW community served by one medical practice, especially for older children. 相似文献
3.
4.
5.
Anuj Shrestha Zeeshan Jawa Kathryn L. Koch Amy B. Rankin Qun Xiang Anand Padmanabhan Matthew S. Karafin Joshua J. Field 《Journal of clinical apheresis》2015,30(6):353-358
Red cell exchange (RCE) is a common procedure in adults with sickle cell disease (SCD). Implantable dual lumen Vortex (DLV) ports can be used for RCE in patients with poor peripheral venous access. We performed a retrospective cohort study of RCE procedures performed in adults with SCD. The main objective of the study was to compare the inlet speed, duration of procedures and rate of complications performed through DLV ports to those performed through temporary central venous and peripheral catheters. Twenty‐nine adults with SCD underwent a total of 318 RCE procedures. Twenty adults had DLV ports placed and 218 procedures were performed using DLV ports. Mean length of follow‐up after DLV port placement was 397 ± 263 days. Six DLV ports were removed due to infection and 1 for malfunction after a mean of 171 ± 120 days. Compared to temporary central venous and peripheral catheters, DLV port procedures had a greater rate of procedural complications, a longer duration, and a lower inlet speed (all P < 0.01). When accounting for the maximum allowable inlet speed to avoid citrate toxicity, 40% of DLV port procedures were greater than 10% below maximum speed, compared to 7 and 14% of procedures performed through temporary central venous and peripheral catheters (P < 0.0001). In conclusion, DLV ports can be used for RCE in adults with SCD, albeit with more procedural complications and longer duration. The smaller internal diameter and longer catheter of DLV ports compared to temporary central venous catheters likely accounts for the differences noted. J. Clin. Apheresis 30:353–358, 2015. © 2015 Wiley Periodicals, Inc. 相似文献
6.
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7.
Kathryn Huggett 《Medical education》2015,49(11):1160-1161
8.
9.
10.