全文获取类型
收费全文 | 2715771篇 |
免费 | 197691篇 |
国内免费 | 8693篇 |
专业分类
耳鼻咽喉 | 35873篇 |
儿科学 | 89546篇 |
妇产科学 | 75045篇 |
基础医学 | 381907篇 |
口腔科学 | 74383篇 |
临床医学 | 246069篇 |
内科学 | 542802篇 |
皮肤病学 | 65786篇 |
神经病学 | 226592篇 |
特种医学 | 103971篇 |
外国民族医学 | 755篇 |
外科学 | 401516篇 |
综合类 | 52017篇 |
现状与发展 | 5篇 |
一般理论 | 1043篇 |
预防医学 | 206898篇 |
眼科学 | 58862篇 |
药学 | 198522篇 |
10篇 | |
中国医学 | 6035篇 |
肿瘤学 | 154518篇 |
出版年
2021年 | 23483篇 |
2019年 | 24245篇 |
2018年 | 33421篇 |
2017年 | 25779篇 |
2016年 | 29833篇 |
2015年 | 33523篇 |
2014年 | 45842篇 |
2013年 | 67669篇 |
2012年 | 90658篇 |
2011年 | 95367篇 |
2010年 | 57277篇 |
2009年 | 54526篇 |
2008年 | 87965篇 |
2007年 | 92859篇 |
2006年 | 93954篇 |
2005年 | 89640篇 |
2004年 | 86318篇 |
2003年 | 83087篇 |
2002年 | 79907篇 |
2001年 | 130528篇 |
2000年 | 133265篇 |
1999年 | 112283篇 |
1998年 | 32485篇 |
1997年 | 28851篇 |
1996年 | 27097篇 |
1995年 | 27993篇 |
1994年 | 25637篇 |
1993年 | 23910篇 |
1992年 | 86102篇 |
1991年 | 82476篇 |
1990年 | 79582篇 |
1989年 | 76815篇 |
1988年 | 70162篇 |
1987年 | 68593篇 |
1986年 | 64164篇 |
1985年 | 61074篇 |
1984年 | 45413篇 |
1983年 | 38321篇 |
1982年 | 22757篇 |
1981年 | 20217篇 |
1979年 | 39283篇 |
1978年 | 27673篇 |
1977年 | 23438篇 |
1976年 | 21680篇 |
1975年 | 23066篇 |
1974年 | 27073篇 |
1973年 | 25640篇 |
1972年 | 24038篇 |
1971年 | 22200篇 |
1970年 | 20410篇 |
排序方式: 共有10000条查询结果,搜索用时 620 毫秒
91.
A case of Rubinstein‐Taybi syndrome associated with growth hormone deficiency in childhood 下载免费PDF全文
92.
93.
94.
Monique G. Kumar M.Phil. M.D. Heather Ciliberto M.D. Susan J. Bayliss M.D. 《Pediatric dermatology》2015,32(2):198-200
Pediatric trachyonychia is an acquired nail disease that can cause distress to families. It is a poorly understood disease, and long‐term follow‐up data are lacking. We present an institutional review of 11 children with isolated pediatric trachyonychia followed over time. Children with the diagnosis of pediatric trachyonychia were identified and invited to participate. Pictures were taken on follow‐up and a questionnaire was answered. Exclusion criteria include having another diagnosis at the initial visit that causes nail dystrophy. Eleven patients with the diagnosis of pediatric trachyonychia were available for follow‐up. The mean age of appearance was 2.7 years (range 2–7 yrs) and the average follow‐up was 66 months (range 10–126 mos). Nine patients were treated with potent topical corticosteroids, one used only petrolatum, and one took vitamin supplements. One patient was found to have an additional skin and hair diagnosis of alopecia areata on follow‐up. On follow‐up, 82% noted improvement of the nails, whereas 18% noted no change. A majority of cases of pediatric trachyonychia are isolated and improve with time, regardless of treatment. 相似文献
95.
96.
Ki-Yong An Andria R. Morielli Dong-Woo Kang Christine M. Friedenreich Donald C. McKenzie Karen Gelmon John R. Mackey Robert D. Reid Kerry S. Courneya 《International journal of cancer. Journal international du cancer》2020,146(1):150-160
The Combined Aerobic and Resistance Exercise (CARE) Trial compared different types and doses of exercise performed during breast cancer chemotherapy. Here, we report the longer-term follow-up of patient-reported outcomes, health-related fitness and exercise behavior at 6, 12 and 24 months postintervention. A multicenter trial in Canada randomized 301 breast cancer patients initiating chemotherapy to thrice weekly, supervised exercise consisting of a standard dose of 25–30 min of aerobic exercise (STAN; n = 96), a higher dose of 50–60 min of aerobic exercise (HIGH; n = 101) or a combined dose of 50–60 min of aerobic and resistance exercise (COMB; n = 104) performed for the duration of chemotherapy (median of 17 weeks). Primary outcomes were patient-reported outcomes including quality of life, cancer-related symptoms and psychosocial outcomes. Secondary outcomes were objective health-related fitness (assessed at 12 months only) and self-reported exercise behavior. A total of 269 (89.4%) participants completed patient-reported outcomes at all three follow-up time points and 263 (87.4%) completed the health-related fitness assessment at 12-month follow-up. COMB was significantly superior to (i) STAN for sleep quality at 6-month follow-up (p = 0.027); (ii) HIGH for upper body muscular endurance at 12-month follow-up (p = 0.020); and (iii) HIGH for meeting the resistance exercise guideline at 6-month follow-up (p = 0.006). Moreover, self-reported meeting of the combined exercise guideline during follow-up was significantly associated with better patient-reported outcomes and health-related fitness. Performing combined exercise during and after breast cancer chemotherapy may result in better longer-term patient-reported outcomes and health-related fitness compared to performing aerobic exercise alone. 相似文献
97.
98.
Wojciech Szychta M.D. Ph.D. Gheorghe Cerin M.D. Ph.D. F.E.S.C. Bogdan Adrian Popa M.D. Armienti Felice M.D. Guido Lanzillo M.D. Ph.D. Marco Diena M.D. Grzegorz Opolski M.D. Ph.D. F.E.S.C. 《Echocardiography (Mount Kisco, N.Y.)》2015,32(6):1040-1043
Sinus venosus atrial septal defect (SV‐ASD) usually coexists with partial anomalous pulmonary vein connection (PAPVC). It is a difficult diagnosis in transthoracic echocardiography (TTE) due to eccentric position of defects. We present a rare case of atypical anatomical variation in PAPVC, which was never described before. Two right pulmonary veins drained into superior vena cava, which overrode SV‐ASD and interatrial septum, a third pulmonary vein into the right atrium. Complete diagnosis could not be set after TTE, nor transesophageal echocardiography, whereas angio‐CT was finally conclusive. This diagnostic approach allowed the surgical planning. 相似文献
99.
100.