全文获取类型
收费全文 | 1698篇 |
免费 | 203篇 |
国内免费 | 19篇 |
专业分类
耳鼻咽喉 | 24篇 |
儿科学 | 152篇 |
妇产科学 | 29篇 |
基础医学 | 113篇 |
口腔科学 | 52篇 |
临床医学 | 227篇 |
内科学 | 326篇 |
皮肤病学 | 104篇 |
神经病学 | 45篇 |
特种医学 | 149篇 |
外科学 | 333篇 |
综合类 | 95篇 |
现状与发展 | 30篇 |
预防医学 | 65篇 |
眼科学 | 55篇 |
药学 | 39篇 |
中国医学 | 3篇 |
肿瘤学 | 79篇 |
出版年
2024年 | 14篇 |
2023年 | 180篇 |
2022年 | 12篇 |
2021年 | 23篇 |
2020年 | 59篇 |
2019年 | 30篇 |
2018年 | 59篇 |
2017年 | 52篇 |
2016年 | 54篇 |
2015年 | 71篇 |
2014年 | 100篇 |
2013年 | 79篇 |
2012年 | 58篇 |
2011年 | 58篇 |
2010年 | 87篇 |
2009年 | 101篇 |
2008年 | 48篇 |
2007年 | 70篇 |
2006年 | 34篇 |
2005年 | 41篇 |
2004年 | 33篇 |
2003年 | 39篇 |
2002年 | 39篇 |
2001年 | 26篇 |
2000年 | 25篇 |
1999年 | 50篇 |
1998年 | 41篇 |
1997年 | 56篇 |
1996年 | 43篇 |
1995年 | 40篇 |
1994年 | 30篇 |
1993年 | 36篇 |
1992年 | 11篇 |
1991年 | 15篇 |
1990年 | 15篇 |
1989年 | 29篇 |
1988年 | 21篇 |
1987年 | 16篇 |
1986年 | 6篇 |
1985年 | 19篇 |
1984年 | 7篇 |
1982年 | 8篇 |
1981年 | 10篇 |
1980年 | 12篇 |
1978年 | 5篇 |
1977年 | 5篇 |
1976年 | 13篇 |
1975年 | 10篇 |
1974年 | 4篇 |
1969年 | 10篇 |
排序方式: 共有1920条查询结果,搜索用时 15 毫秒
1.
A mixed‐method study of effects of a therapeutic play intervention for children on parental anxiety and parents' perceptions of the intervention
下载免费PDF全文
![点击此处可从《Journal of advanced nursing》网站下载免费的PDF全文](/ch/ext_images/free.gif)
2.
Hysterosalpingography was performed in 31 patients by means of a low-dose scanning-beam digital radiographic system. The technique permits adequate evaluation of gynecologic abnormalities while allowing significant reduction in radiation: 2.4-mR (6.1 X 10(-7) C/kg) exposure to the skin and 0.7-mrad (7 X 10(-6) Gy) mean dose to the ovaries per image obtained. Sixteen patients demonstrated readily recognizable and documented abnormalities, corroborated by laparoscopy, laparotomy, or other supportive evidence. 相似文献
3.
4.
Intra-amniotic inflammation in human gastroschisis: possible aetiology of postnatal bowel dysfunction 总被引:1,自引:0,他引:1
John J. Morrison Lecturer/Senior Registrar Nigel Klein Consultant † Lyn S. Chitty Consultant Gabriella Kocjan Consultant Denise Walshe Laboratory Assistant † Mark Goulding Laboratory Assistant † Michael P. Geary Research Fellow Agostino Pierro Consultant § Charles H. Rodeck Professor 《BJOG : an international journal of obstetrics and gynaecology》1998,105(11):1200-1204
5.
6.
7.
8.
M Pacilli N J Sebire D Maritsi E M Kiely D P Drake J I Curry A Pierro 《Zeitschrift für Kinderchirurgie》2007,17(6):397-399
AIM OF THE STUDY: The umbilical polyp is a rare congenital lesion resulting from the persistence of omphalomesenteric duct (OMD) enteric mucosa at the umbilicus. Exploration of the abdomen to exclude the presence of associated OMD remnants is controversial. The aim of this study was to evaluate the need for peritoneal cavity exploration in children with umbilical polyp. METHODS: All umbilical lesions (n = 53) excised between 1995 and 2005 in a single institution were reviewed to identify patients with umbilical polyp (n = 13). This is characterised histologically by the presence of gastrointestinal mucosa. A follow-up study of patients with umbilical polyp was performed. Data are reported as median (range). RESULTS AND CONCLUSIONS: All 13 patients underwent excision of an umbilical polyp at a median age of 15.1 months (3.1 - 80.5). All presented with a discharging polyp (associated with bleeding in 9) which did not respond to topical silver nitrate. Median diameter of the lesions was 0.5 cm (0.2 - 1). Histology revealed the presence of small bowel mucosa in 11 (associated with pancreatic tissue in 1 and gastric mucosa in 1) and large bowel mucosa in 2. All patients underwent inspection and probing of the base of the polyp after its excision. In 6 patients an associated OMD anomaly was suspected and exploration of the peritoneal cavity was performed (mini-laparotomy in 5 and laparoscopy in 1). No OMD anomaly was found. The 7 children who did not undergo exploration of the abdominal cavity remain asymptomatic after 5.8 years (0.9 - 13.7) follow-up. An umbilical polyp can be present in the absence of other OMD anomalies. Exploration of the peritoneal cavity in children with an umbilical polyp does not seem to be necessary. 相似文献
9.
Solitary bronchioloalveolar carcinoma: CT criteria 总被引:14,自引:0,他引:14
Kuhlman JE; Fishman EK; Kuhajda FP; Meziane MM; Khouri NF; Zerhouni EA; Siegelman SS 《Radiology》1988,167(2):379-382
The computed tomographic (CT) scans of 30 patients with solitary bronchioloalveolar carcinoma were reviewed. Common features at CT included the peripheral or subpleural location of a pulmonary mass (25 cases), pseudocavitation (18 cases), heterogeneous attenuation (17 cases), irregular margins forming a star pattern (22 cases), and pleural tags (21 cases). Using these CT criteria, four independent observers attempted to identify cases of bronchioloalveolar carcinoma from a larger sample of lung cancers and benign lesions by categorizing a series of test cases into four probability categories. Although the bronchioloalveolar carcinomas were correctly ranked in the two highest probability categories 75% of the time (in 45 of 60 cases), there was considerable overlap with other lung lesions, particularly with adenocarcinoma and large cell undifferentiated carcinoma. However, even though the typical features of bronchioloalveolar carcinoma are not invariable or highly specific, they are characteristic enough to suggest the diagnosis. 相似文献
10.