全文获取类型
收费全文 | 6766篇 |
免费 | 278篇 |
国内免费 | 31篇 |
专业分类
耳鼻咽喉 | 63篇 |
儿科学 | 148篇 |
妇产科学 | 83篇 |
基础医学 | 981篇 |
口腔科学 | 175篇 |
临床医学 | 340篇 |
内科学 | 1375篇 |
皮肤病学 | 74篇 |
神经病学 | 690篇 |
特种医学 | 237篇 |
外科学 | 1272篇 |
综合类 | 42篇 |
预防医学 | 192篇 |
眼科学 | 98篇 |
药学 | 473篇 |
中国医学 | 14篇 |
肿瘤学 | 818篇 |
出版年
2023年 | 24篇 |
2022年 | 68篇 |
2021年 | 112篇 |
2020年 | 64篇 |
2019年 | 76篇 |
2018年 | 112篇 |
2017年 | 90篇 |
2016年 | 87篇 |
2015年 | 104篇 |
2014年 | 109篇 |
2013年 | 177篇 |
2012年 | 333篇 |
2011年 | 353篇 |
2010年 | 210篇 |
2009年 | 217篇 |
2008年 | 327篇 |
2007年 | 379篇 |
2006年 | 391篇 |
2005年 | 407篇 |
2004年 | 423篇 |
2003年 | 416篇 |
2002年 | 396篇 |
2001年 | 152篇 |
2000年 | 142篇 |
1999年 | 154篇 |
1998年 | 129篇 |
1997年 | 115篇 |
1996年 | 80篇 |
1995年 | 65篇 |
1994年 | 79篇 |
1993年 | 85篇 |
1992年 | 103篇 |
1991年 | 117篇 |
1990年 | 100篇 |
1989年 | 116篇 |
1988年 | 93篇 |
1987年 | 63篇 |
1986年 | 64篇 |
1985年 | 67篇 |
1984年 | 59篇 |
1983年 | 51篇 |
1982年 | 32篇 |
1981年 | 30篇 |
1980年 | 40篇 |
1979年 | 44篇 |
1978年 | 34篇 |
1977年 | 39篇 |
1976年 | 18篇 |
1974年 | 18篇 |
1969年 | 13篇 |
排序方式: 共有7075条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
A Kubota A Okada K Imura H Kawahara R Nezu S Kamata Y Takagi 《Journal of pediatric surgery》1990,25(6):618-621
The effect of metronidazole (MNZ) on hepatic dysfunction associated with total parenteral nutrition (TPN) in neonates was investigated. Neonates receiving TPN for more than 2 weeks were divided into three groups. In group 1, TPN was given alone, in group 2, 25 mg/kg/d of MNZ was administered intravenously for the first 2 weeks of TPN, and in group 3, 50 mg/kg/d of MNZ was given for the first 3 weeks of TPN. Several parameters of liver function tests (LFTs) during the first 4 weeks of TPN were compared among these three groups. There was no significant difference of these parameters between group 1 and group 2. Although there was no significant difference of alkaline phosphatase, gamma-glutamyl transpeptidase, direct bilirubin, and total bile acid between groups 1 and 3, transaminase (glutamic oxaloacetic, glutamic pyruvic) of group 3 remained significantly lower than those of group 1. In conclusion, the administration of MNZ 50 mg/kg/d for 3 weeks, at least, prevented the elevation of transaminase during TPN in neonates, suggesting the possible involvement of intestinal anaerobic flora in the pathogenesis of TPN-associated liver dysfunction. 相似文献
7.
Successful treatment of a patient with penetrating injury of the esophagus and brachiocephalic artery due to migration of Kirschner wires. 总被引:2,自引:0,他引:2
Shinsuke Wada Tsuyoshi Noguchi Tsuyoshi Hashimoto Yuzo Uchida Katsunobu Kawahara 《Annals of thoracic and cardiovascular surgery》2005,11(5):313-315
Pins and wires offer the simplest and most effective tools for managing bone fractures and dislocations. Migration of these devices within the chest is rare, but can cause serious problems. The spontaneous migration of Kirschner wires from the right clavicle to the mediastinum resulted in penetrating injury of the esophagus and pseudo-aneurysm of the brachiocephalic artery in an 84-year-old patient. Two Kirschner wires were removed via a vertical incision on the right shoulder without thoracotomy and the brachiocephalic artery was replaced with a Dacron graft. 相似文献
8.
Katsumi Shigemura Soichi Arakawa Kunito Yamanaka Nobuo Kataoka Keiji Yuien Masato Fujisawa 《International journal of urology》2007,14(10):935-938
OBJECTIVES: Lateral biopsies are thought to have a better cancer detection rate compared with standard sextant biopsies. This study aimed to determine whether lateral peripheral zone biopsies in Japanese men who underwent transrectal ultrasound-guided prostate biopsies provided a significantly higher cancer detection rate than sextant biopsies. METHODS: Between 1999 and 2004, data were collected from 461 men who underwent prostate biopsy and had enough data regarding the performance of lateral biopsies for statistical analysis. There were two categories in this study: (i) patients who underwent sextant prostate biopsies; and (ii) patients who underwent sextant biopsies plus lateral biopsies. RESULTS: Prostate cancer was detected in 141 (30.6%) of 461 patients. It was detected in 24 (22.2%) of 108 patients who underwent sextant biopsies and 117 (33.1%) of 353 patients who underwent sextant plus lateral biopsies. Lateral biopsies were not associated with a statistically higher rate of positive biopsy findings; however, we found a significantly higher ratio of patients with positive findings in those with prostate specific antigen (PSA) levels 10 ng/mL (one of 71, 1.4%) among those who had positive cores only in lateral biopsy samples (P < 0.0001). CONCLUSIONS: Lateral biopsies did not show a significantly higher detection ratio of prostate cancer compared to sextant biopsies. However, lateral biopsies were more effective than sextant biopsies in patients with lower PSA levels. Our findings might be useful for the establishment of biopsy strategies to detect prostate cancer, especially in patients with lower PSA levels. 相似文献
9.
Neoplastic angioendotheliosis has rarely been described as a respiratory disease. A patient is described with pulmonary vascular involvement induced by neoplastic angioendotheliosis in pulmonary vessels. 相似文献
10.
Histamine-type 2 antagonists (H2-blockers) as represented by cimentidine have been shown to adversely affect renal allograft function, particularly when coadministered
with cyclosporine, currently a major immunosuppressant. To determine whether or not a newer and more powerful H2-blocker, famotidine, would produce similar adverse effects, we assessed seven cyclosporine-treated renal allograft recipients
with regard to changes in their renal function on or off the H2-blocker over a one-week period. Neither the administration nor withdrawal of famotidine (20–40 mg/day) resulted in any significant
changes in serum creatine, BUN, urine output or cyclosporine trough levels, suggesting that famotidine can be safely administered
as an H2-blocker to cyclosporine-treated renal allograft recipients. 相似文献