全文获取类型
收费全文 | 6852篇 |
免费 | 419篇 |
国内免费 | 15篇 |
专业分类
耳鼻咽喉 | 69篇 |
儿科学 | 261篇 |
妇产科学 | 238篇 |
基础医学 | 907篇 |
口腔科学 | 313篇 |
临床医学 | 573篇 |
内科学 | 1218篇 |
皮肤病学 | 408篇 |
神经病学 | 493篇 |
特种医学 | 265篇 |
外国民族医学 | 3篇 |
外科学 | 880篇 |
综合类 | 82篇 |
一般理论 | 3篇 |
预防医学 | 499篇 |
眼科学 | 77篇 |
药学 | 357篇 |
中国医学 | 4篇 |
肿瘤学 | 636篇 |
出版年
2021年 | 74篇 |
2019年 | 65篇 |
2018年 | 105篇 |
2017年 | 62篇 |
2016年 | 108篇 |
2015年 | 118篇 |
2014年 | 157篇 |
2013年 | 209篇 |
2012年 | 293篇 |
2011年 | 299篇 |
2010年 | 193篇 |
2009年 | 180篇 |
2008年 | 245篇 |
2007年 | 252篇 |
2006年 | 240篇 |
2005年 | 230篇 |
2004年 | 197篇 |
2003年 | 197篇 |
2002年 | 208篇 |
2001年 | 197篇 |
2000年 | 200篇 |
1999年 | 188篇 |
1998年 | 97篇 |
1997年 | 105篇 |
1996年 | 78篇 |
1994年 | 70篇 |
1993年 | 69篇 |
1992年 | 104篇 |
1991年 | 127篇 |
1990年 | 114篇 |
1989年 | 125篇 |
1988年 | 135篇 |
1987年 | 121篇 |
1986年 | 127篇 |
1985年 | 127篇 |
1984年 | 83篇 |
1983年 | 62篇 |
1982年 | 68篇 |
1979年 | 83篇 |
1978年 | 71篇 |
1977年 | 79篇 |
1976年 | 61篇 |
1975年 | 56篇 |
1974年 | 64篇 |
1973年 | 73篇 |
1972年 | 72篇 |
1971年 | 74篇 |
1970年 | 80篇 |
1969年 | 60篇 |
1968年 | 74篇 |
排序方式: 共有7286条查询结果,搜索用时 15 毫秒
1.
BARI NUHOLU ALI AYYILDIZ VECIHI FIDAN ÖZDEN CEBECI UUR KOAR CANKON GERMIYANOLU 《International journal of urology》2006,13(2):109-110
OBJECTIVE: Nocturnal enuresis is a common pediatric problem, the etiology of which is unclear. In recent years, various studies have been published stating that children with nocturnal enuresis exhibit growth and skeletal maturation retardation. METHODS: In this cross-sectional study, we included 27 patients (16 boys, 11 girls) between the ages of 6 and 14 years who had presented with primary nocturnal enuresis (PNE) complaints. We included in the evaluation 19 healthy subjects (12 boys, 7 girls), who were the siblings of the children with PNE, as the control group. RESULTS: The patients in both groups were similar in chronological age, bone age, height and weight, with no significant difference between groups (P>0.05). CONCLUSION: The two groups in our study consisted of the same genetic background. Thus, our results were found to be different from the previous studies. We have concluded that there is no direct relationship between enuresis nocturnal and skeletal maturation. 相似文献
2.
Frank Marusch Andreas Koch Uwe Schmidt Hubertus Wenisch Michael Ernst Thomas Manger Stefanie Wolff Matthias Pross Jörg Tautenhahn Ingo Gastinger Hans Lippert 《Langenbeck's archives of surgery / Deutsche Gesellschaft fur Chirurgie》2002,387(2):94-100
BACKGROUND: The problems associated with rectal surgery are frequently discussed with no reference being made to the distance of the tumor from the anal verge. This study examined the effect of the location of the tumor on early postoperative results. PATIENTS AND METHODS: This was a multicenter study involving 75 German hospitals and 3756 patients, of whom 1463 had rectal carcinoma. On the basis of the location of the tumor (distance from the anal verge), four groups were distinguished: <4, 4-7.9, 8-11.9, and 12-16 cm. RESULTS: Resection and abdominoperineal resection rates and the incidence of postoperative complications depended on the location of the tumor. Significantly higher resection rates and fewer specific complications, and a significant reduction in overall postoperative morbidity were found with tumor locations more than 8 cm from the anal verge. The highest anastomotic leak rate was observed with anastomoses less than 7 cm from the anal verge. The logistic regression showed that the distance of the tumor from the anal verge is an independent variable for the development of an anastomotic leak. CONCLUSIONS: Early results are greatly affected by the location of the rectal carcinoma. This applies to both abdominoperineal resection rates and specific postoperative complications, such as anastomotic leak rate and operation morbidity in general. 相似文献
3.
4.
5.
T Schaub H M Dittrich A Antoniadis P Wolff P Gutjahr 《R?ntgen-Bl?tter; Zeitschrift für R?ntgen-Technik und medizinisch-wissenschaftliche Photographie》1986,39(10):287-290
Spinal Ewing's sarcomas are rare and cause problems in differential diagnosis. The radiologic, nuclear medicine and CT findings in two children with histologically proven Ewing's sarcoma are presented and problems in differential diagnosis discussed. Biopsy should be done early. 相似文献
6.
Stephan Haarmann Andi Setiawan Budihardja Thomas Mücke Christian Schwaegerl Klaus Dietrich Wolff 《Mund-, Kiefer- und Gesichtschirurgie》2007,11(6):363-367
Mechanical airway obstruction secondary to retropharyngeal bleeding is rare. In most cases such a complication is described
after head and neck trauma. Complicating factors include anticoagulant therapy, tumour, aneurysm, infection or major cervical
spine injury. A precise initial diagnosis is necessary to avoid a life-threatening situation. Lateral X-ray and computed tomography
is essential for safe management.
Treatment depends upon size of the haematoma as well as the clinical course of the patient. Smaller haematomas may be observed.
Lager haematomas and those that fail to reabsorb should undergo drainage.
相似文献
7.
8.
9.
The surgical risk of colectomy in patients with cirrhosis 总被引:5,自引:1,他引:4
Dr. Amanda Mary Teresa Metcalf M.D. Roger R. Dozois M.D. Bruce G. Wolff M.D. Robert W. Beart Jr. M.D. 《Diseases of the colon and rectum》1987,30(7):529-531
The records of 54 patients with documented cirrhosis who underwent colectomy between January 1970 and January 1984 were studied to assess the operative risk and to determine the preoperative predictive risk factors. In-hospital mortality was 24 percent (13 patients), and postoperative complications occurred in 48 percent (26 patients). The risk of surgical intervention was significantly increased if encephalopathy, ascites, anemia, or hypoalbuminemia was present before operation. A simple operative risk index involving the presence of encephalopathy and ascites and the levels of hemoglobin and albumin is proposed to help distinguish a low-risk subgroup in whom postoperative mortality was 12.8 percent from a high-risk subgroup in whom postoperative mortality was 53.3 percent. 相似文献
10.