全文获取类型
收费全文 | 1042篇 |
免费 | 76篇 |
国内免费 | 2篇 |
专业分类
耳鼻咽喉 | 10篇 |
儿科学 | 39篇 |
妇产科学 | 33篇 |
基础医学 | 137篇 |
口腔科学 | 79篇 |
临床医学 | 116篇 |
内科学 | 246篇 |
皮肤病学 | 26篇 |
神经病学 | 70篇 |
特种医学 | 18篇 |
外科学 | 89篇 |
综合类 | 7篇 |
预防医学 | 58篇 |
眼科学 | 23篇 |
药学 | 43篇 |
中国医学 | 2篇 |
肿瘤学 | 124篇 |
出版年
2022年 | 15篇 |
2021年 | 24篇 |
2020年 | 23篇 |
2019年 | 35篇 |
2018年 | 31篇 |
2017年 | 28篇 |
2016年 | 28篇 |
2015年 | 30篇 |
2014年 | 35篇 |
2013年 | 56篇 |
2012年 | 54篇 |
2011年 | 73篇 |
2010年 | 51篇 |
2009年 | 45篇 |
2008年 | 52篇 |
2007年 | 82篇 |
2006年 | 55篇 |
2005年 | 55篇 |
2004年 | 69篇 |
2003年 | 66篇 |
2002年 | 46篇 |
2001年 | 19篇 |
2000年 | 21篇 |
1999年 | 11篇 |
1998年 | 11篇 |
1997年 | 7篇 |
1996年 | 6篇 |
1995年 | 5篇 |
1994年 | 2篇 |
1993年 | 4篇 |
1992年 | 6篇 |
1991年 | 7篇 |
1990年 | 8篇 |
1989年 | 6篇 |
1988年 | 10篇 |
1987年 | 2篇 |
1986年 | 4篇 |
1985年 | 6篇 |
1984年 | 7篇 |
1983年 | 3篇 |
1982年 | 2篇 |
1979年 | 7篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1972年 | 2篇 |
1971年 | 1篇 |
1970年 | 1篇 |
1967年 | 1篇 |
1965年 | 2篇 |
1961年 | 1篇 |
排序方式: 共有1120条查询结果,搜索用时 15 毫秒
51.
Paroxetine controlled release in the treatment of menopausal hot flashes: a randomized controlled trial 总被引:13,自引:0,他引:13
Context Standard therapy for hot flashes has been hormone replacement with estradiol or progestational agents, but recent data suggest that antidepressants inhibiting serotonin reuptake may also be effective. Objective To evaluate a selective serotonin reuptake inhibitor (paroxetine controlled release [CR]) in treating the vasomotor symptoms displayed by a general cross-section of menopausal women. Design and Setting Randomized, double-blind, placebo-controlled, parallel group study conducted across 17 US sites, including urban, suburban, and rural clinics. Patients A total of 165 menopausal women aged 18 years or older experiencing at least 2 to 3 daily hot flashes and must have discontinued any hormone replacement therapy for at least 6 weeks. Women were excluded if they had any signs of active cancer or were undergoing chemotherapy or radiation therapy. Intervention After a 1-week placebo run-in phase, study participants were randomized to receive placebo or receive 12.5 mg/d or 25.0 mg/d of paroxetine CR (in a 1:1:1 ratio) for 6 weeks. Main Outcome Measures Mean change from baseline to week 6 in the daily hot flash composite score (frequency x severity). Results Fifty-six participants were randomly assigned to receive placebo and 51 to receive 12.5 mg/d and 58 to receive 25.0 mg/d of paroxetine CR. The mean reductions in the hot flash frequency composite score from baseline to week 6 were statistically significantly greater for those receiving paroxetine CR than for those receiving placebo. By week 6, the mean daily hot flash frequency went from 7.1 to 3.8 (mean reduction, 3.3) for those in the 12.5-mg/d and from 6.4 to 3.2 (mean reduction, 3.2) for those in the 25-mg/d paroxetine CR groups and from 6.6 to 4.8 (mean reduction, 1.8) for those in the placebo group. Mean placebo-adjusted reduction in hot flash composite scores were -4.7 (95% confidence interval, - 8.1 to -1.3; P = .007) comparing 12.5-mg/d paroxetine CR with placebo; and -3.6 (95% confidence interval, -6.8 to -0.4; P = .03) comparing 25.0-mg/d paroxetine CR with placebo. This corresponded to median reductions of 62.2% for those in the 12.5-mg/d and 64.6% for those in the 25.0-mg/d paroxetine CR groups compared with 37.8% for those in the placebo group. Conclusion Paroxetine CR may be an effective and acceptable alternative to hormone replacement and other therapies in treating menopausal hot flash symptoms. 相似文献
52.
Sentinel lymphadenectomy after neoadjuvant chemotherapy for breast cancer may reliably represent the axilla except for inflammatory breast cancer 总被引:10,自引:0,他引:10
Stearns V Ewing CA Slack R Penannen MF Hayes DF Tsangaris TN 《Annals of surgical oncology》2002,9(3):235-242
Background After neoadjuvant chemotherapy, women with locally advanced breast cancer (LABC) undergo a modified radical mastectomy or
lumpectomy with axillary lymph node dissection (ALND) and radiotherapy. Sentinel lymphadenectomy (SL) is accepted for axillary
evaluation in early breast cancer. We assessed the feasibility and predictive value of SL after neoadjuvant chemotherapy.
Methods Eligible women received neoadjuvant therapy for LABC and were scheduled to undergo a definitive surgical procedure. Vital
blue dye SL was attempted followed by level I and II axillary dissection.
Results SL was successful in 29 of 34 patients (detection rate, 85%). Thirteen patients (45%) had positive nodes, and eight (28%)
had negative nodes on both SL and ALND. In five patients (17%), the sentinel node was the only positive node identified. Overall,
there was a 90% concordance between SL and ALND. The false-negative rate and negative predictive value were 14% and 73%, respectively.
Among the subgroup without inflammatory cancer, the detection and concordance rates were 89% and 96%, respectively. The false-negative
rate was 6%, and the negative predictive value was 88%.
Conclusions SL after neoadjuvant chemotherapy may reliably predict axillary staging except in inflammatory breast cancer. Further studies
are required to assess the utility of SL as the only mode of axillary evaluation in these women. 相似文献
53.
Gül Yesiltepe Mutlu M.D. Yuval Ramot M.D. M.Sc. Kadir Babaoglu M.D. Gurkan Altun M.D. Abraham Zlotogorski M.D. Vered Molho‐Pessach M.D. 《Pediatric dermatology》2013,30(5):e70-e73
We present a 10‐year‐old girl with typical clinical features of H syndrome. Complete agenesis of the inferior vena cava was found on echocardiography and radiologic studies. Mutation analysis of the SLC29A3 gene revealed a novel nonsense mutation. This unique case extends the clinical and mutation spectrum associated with H syndrome and underlines the importance of routine cardiac screening in this disorder. 相似文献
54.
55.
Syed Khajamohiddin Elisha Raju Repalle Aleem Basha Pinjari Mike Merrick Dayananda Siddavattam 《Critical reviews in microbiology》2013,39(1):13-31
Meta fission product (MFP) hydrolases catalyze hydrolysis of a low reactive carbon-carbon bond found in meta-fission products, generated during biodegradation of various aromatic compounds. These enzymes belong to the alpha/beta hydrolase super family and show structural conservation despite having poor sequence similarity. MFP-hydrolases are substrate specific and studies have indicated that this substrate specificity plays a key role in the determination of the organism's ability to degrade a particular substrate. In this concise review of MFP-hydrolases we discuss their classification, biochemical properties, the molecular basis of their substrate specificity, their catalytic mechanism, and evolutionary significance. 相似文献
56.
Vered Ben-David 《Child & youth care forum》2011,40(3):233-249
Ambiguity over the concepts of “parental capability” and “the child’s best interests” in the Israeli adoption law, and a lack
of sufficient professional knowledge can lead to bias in the professional decision-making process regarding child adoption.
This study investigates the idea that judges do not use only legal considerations and relevant information relating to the
child-parent relationship but also social information about the biological parent whose parental capability is under legal
consideration. The study makes use of the priming paradigm as a conceptual framework for understanding the possible effect
of social information on legal judgments in child adoption cases. The textual narrative analysis of 130 court decisions in
favor of compulsory adoption reveals the use in courts of three kinds of social information about biological parents: familial
information, sexual information, and social-functional information. The study discusses the role of such information in establishing
the judicial narrative of parental incapability. In order to “de-bias” the judicial decision-making process regarding child
placement, a number of strategies for consideration as social policy are proposed. 相似文献
57.
58.
High-dose intravenous isosorbide-dinitrate is safer and better than Bi-PAP ventilation combined with conventional treatment for severe pulmonary edema 总被引:14,自引:0,他引:14
Sharon A Shpirer I Kaluski E Moshkovitz Y Milovanov O Polak R Blatt A Simovitz A Shaham O Faigenberg Z Metzger M Stav D Yogev R Golik A Krakover R Vered Z Cotter G 《Journal of the American College of Cardiology》2000,36(3):832-837
OBJECTIVE: To determine the feasibility, safety and efficacy of bilevel positive airway ventilation (BiPAP) in the treatment of severe pulmonary edema compared to high dose nitrate therapy. BACKGROUND: Although noninvasive ventilation is increasingly used in the treatment of pulmonary edema, its efficacy has not been compared prospectively with newer treatment modalities. METHODS: We enrolled 40 consecutive patients with severe pulmonary edema (oxygen saturation <90% on room air prior to treatment). All patients received oxygen at a rate of 10 liter/min, intravenous (IV) furosemide 80 mg and IV morphine 3 mg. Thereafter patients were randomly allocated to receive 1) repeated boluses of IV isosorbide-dinitrate (ISDN) 4 mg every 4 min (n = 20), and 2) BiPAP ventilation and standard dose nitrate therapy (n = 20). Treatment was administered until oxygen saturation increased above 96% or systolic blood pressure decreased to below 110 mm Hg or by more than 30%. Patients whose conditions deteriorated despite therapy were intubated and mechanically ventilated. All treatment was delivered by mobile intensive care units prior to hospital arrival. RESULTS: Patients treated by BiPAP had significantly more adverse events. Two BiPAP treated patients died versus zero in the high dose ISDN group. Sixteen BiPAP treated patients (80%) required intubation and mechanical ventilation compared to four (20%) in the high dose ISDN group (p = 0.0004). Myocardial infarction (MI) occurred in 11 (55%) and 2 (10%) patients, respectively (p = 0.006). The combined primary end point (death, mechanical ventilation or MI) was observed in 17 (85%) versus 5 (25%) patients, respectively (p = 0.0003). After 1 h of treatment, oxygen saturation increased to 96 +/- 4% in the high dose ISDN group as compared to 89 +/- 7% in the BiPAP group (p = 0.017). Due to the significant deterioration observed in patients enrolled in the BiPAP arm, the study was prematurely terminated by the safety committee. CONCLUSIONS: High dose ISDN is safer and better than BiPAP ventilation combined with conventional therapy in patients with severe pulmonary edema. 相似文献
59.
60.