全文获取类型
收费全文 | 2694篇 |
免费 | 139篇 |
国内免费 | 20篇 |
专业分类
耳鼻咽喉 | 52篇 |
儿科学 | 149篇 |
妇产科学 | 200篇 |
基础医学 | 217篇 |
口腔科学 | 128篇 |
临床医学 | 249篇 |
内科学 | 703篇 |
皮肤病学 | 36篇 |
神经病学 | 143篇 |
特种医学 | 80篇 |
外科学 | 494篇 |
综合类 | 53篇 |
预防医学 | 75篇 |
眼科学 | 86篇 |
药学 | 100篇 |
中国医学 | 9篇 |
肿瘤学 | 79篇 |
出版年
2023年 | 22篇 |
2022年 | 20篇 |
2021年 | 61篇 |
2020年 | 43篇 |
2019年 | 54篇 |
2018年 | 69篇 |
2017年 | 66篇 |
2016年 | 110篇 |
2015年 | 107篇 |
2014年 | 129篇 |
2013年 | 184篇 |
2012年 | 237篇 |
2011年 | 218篇 |
2010年 | 127篇 |
2009年 | 128篇 |
2008年 | 180篇 |
2007年 | 209篇 |
2006年 | 167篇 |
2005年 | 172篇 |
2004年 | 152篇 |
2003年 | 118篇 |
2002年 | 86篇 |
2001年 | 66篇 |
2000年 | 40篇 |
1999年 | 43篇 |
1998年 | 9篇 |
1997年 | 6篇 |
1996年 | 5篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1992年 | 4篇 |
1991年 | 3篇 |
1990年 | 2篇 |
1989年 | 4篇 |
1988年 | 1篇 |
1986年 | 2篇 |
1984年 | 1篇 |
1983年 | 2篇 |
1973年 | 1篇 |
排序方式: 共有2853条查询结果,搜索用时 15 毫秒
1.
2.
Karasu Buğra Gunay Betul Onal 《Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie》2020,258(1):99-106
Graefe's Archive for Clinical and Experimental Ophthalmology - To evaluate central macular thickness (CMT), subfoveal choroidal thickness (SFCT), and visual outcomes following different... 相似文献
3.
Murat Gunay Mahmut Dogru Gokhan Celik Betul Onal Gunay 《Cutaneous and ocular toxicology》2019,38(2):131-135
Purpose: To evaluate retinal nerve fiber layer thickness (RNFLT), ganglion cell layer thickness (GCLT), subfoveal choroidal thickness (SFCT), and central retinal thickness (CRT) in asthmatic children who were under inhaled corticosteroid treatment by using Swept-Source Optical Coherence Tomography (SS-OCT).Material and methods: Fifty-three children were prospectively analyzed in the study. Group 1 included 31 asthmatic children and group 2 included 22 healthy children. Asthmatic children received a dose 250?μg daily of inhaled fluticasone propionate (Flexotide, GlaxoSmithKline, Middlesex, UK). Allergy parameters including, exposure to smoke, eosinophil count, percentage of eosinophils, immunoglobuline (Ig) E levels, number of asthma attacks, number of sensitivity to allergens and follow-up time were recorded. The RNFLT, GCLT, SFCT, and CRT were analyzed with SS-OCT and the data were compared between the groups.Results: There were 13 girls (41.9%) and 18 boys (58.1%) in group 1 and 13 girls (59.1%) and 9 boys (40.9%) in group 2 (p?=?0.22). The mean age was 9.3?±?2.2 years in group 1 and 9.9?±?1.5 years in group 2 (p?=?0.08). The mean CRT (239.26?±?34.56 µm versus 226.82?±?26.23 µm, p?=?0.22) and mean SFCT (273.97?±?40.95 µm versus 280.41?±?32.78 µm, p?=?0.54) did not significantly differ between the groups. The superior, inferior, and average RNFLT were significantly lower in group 1 than group 2 (p?0.05). There were significant correlations between total corticosteroid dose and RNFLT (p?0.05) and between IgE levels and GCLT (p?0.05).Conclusions: The SS-OCT revealed that asthmatic children under inhaled corticosteroid treatment have lower RNFLT than healthy subjects. 相似文献
4.
5.
6.
Complete mesocolic excision (CME) is being performed more frequently and has recently become an established oncologic surgical method for right hemicolectomy. Despite its advantages, such as its association with early mobilization, a short hospital stay, early bowel movement, mild postoperative pain, and good cosmesis, CME is technically demanding and carries the risk of severe complications. This study aims to compare the clinical, pathological, and oncological results of open and laparoscopic right hemicolectomy with CME.The data of 76 patients who underwent right hemicolectomy with CME and high vascular ligation were reviewed retrospectively. The patients were divided into 2 groups according to whether the open or laparoscopic technique was used.Thirty-two patients underwent open right hemicolectomy, and 44 patients underwent laparoscopic right hemicolectomy. The 2 groups were similar in age, sex, American Society of Anesthesiologists class, abdominal surgical history, tumor localization, and operation time. No significant differences were found regarding the specimen length, tumor size, harvested lymph nodes, number of metastatic lymph nodes, or tumor grade. According to the Clavien–Dindo classification system, the laparoscopic group had significantly fewer complications than did the open group (11.4% vs 31.2%; P = .04). The open group had a longer postoperative hospital stay than did the laparoscopic hemicolectomy group (9.9 ± 4.7 vs 7.2 ± 3.1 days; P = .002). In addition, the groups were similar with respect to disease-free survival (P = .14) and overall survival (P = .06).The data in this study demonstrated that no differences exist between the open and laparoscopic techniques concerning pathological and oncological results. However, significantly fewer complications and a shorter length of hospital stay were observed in the laparoscopic group than in the open group. Laparoscopic right hemicolectomy with CME and central vascular ligation is a safe and feasible surgical procedure and should be considered the standard technique for right-sided colon cancer. 相似文献
7.
8.
9.
10.