全文获取类型
收费全文 | 9795篇 |
免费 | 797篇 |
国内免费 | 206篇 |
专业分类
耳鼻咽喉 | 135篇 |
儿科学 | 376篇 |
妇产科学 | 222篇 |
基础医学 | 977篇 |
口腔科学 | 103篇 |
临床医学 | 921篇 |
内科学 | 1871篇 |
皮肤病学 | 238篇 |
神经病学 | 588篇 |
特种医学 | 483篇 |
外科学 | 1311篇 |
综合类 | 841篇 |
一般理论 | 3篇 |
预防医学 | 787篇 |
眼科学 | 192篇 |
药学 | 692篇 |
7篇 | |
中国医学 | 423篇 |
肿瘤学 | 628篇 |
出版年
2023年 | 65篇 |
2022年 | 129篇 |
2021年 | 212篇 |
2020年 | 177篇 |
2019年 | 126篇 |
2018年 | 180篇 |
2017年 | 142篇 |
2016年 | 160篇 |
2015年 | 252篇 |
2014年 | 271篇 |
2013年 | 368篇 |
2012年 | 538篇 |
2011年 | 516篇 |
2010年 | 361篇 |
2009年 | 382篇 |
2008年 | 447篇 |
2007年 | 510篇 |
2006年 | 454篇 |
2005年 | 362篇 |
2004年 | 326篇 |
2003年 | 297篇 |
2002年 | 255篇 |
2001年 | 248篇 |
2000年 | 211篇 |
1999年 | 172篇 |
1998年 | 103篇 |
1997年 | 87篇 |
1996年 | 76篇 |
1995年 | 76篇 |
1993年 | 66篇 |
1992年 | 156篇 |
1991年 | 144篇 |
1990年 | 136篇 |
1989年 | 153篇 |
1988年 | 157篇 |
1987年 | 151篇 |
1986年 | 157篇 |
1985年 | 170篇 |
1984年 | 105篇 |
1983年 | 108篇 |
1979年 | 106篇 |
1978年 | 68篇 |
1977年 | 70篇 |
1973年 | 72篇 |
1972年 | 61篇 |
1958年 | 105篇 |
1957年 | 108篇 |
1956年 | 81篇 |
1955年 | 84篇 |
1954年 | 68篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
Laparoscopic trans-cystic-duct common-bile-duct exploration 总被引:1,自引:0,他引:1
One thousand seventy-one consecutive laparoscopic cholecystectomies were performed. Routine cholangiography was employed with a 99% success rate. One hundred thirty patients were found to have common duct stones (CBDS). In 48 (37%) patients they were unsuspected. One hundred eleven patients underwent attempted trans-cystic-duct extraction techniques (TCD-CBDE). One hundred three (93%) were successful. The following techniques were employed: 101—biliary endoscopy, 23—ampullary balloon dilation, 2—fluoroscopic basket retrieval.The average operative time was 136 min. The average postsurgical stay was 3.7 days. There were 19 (17%) complications—6 (5%) major. There were 4 retained stones (2 intentional) and 1 death. Patients over 65 years of age had more complications and patients with unsuspected CBDS under 65 years of age had the fewest.TCD-CBDE is a safe, effective way to extract common duct calculi. Endoscopy and basket stone retrieval was the primary technique employed.Presented at the annual meeting of the Society of American Gastrointestinal Endoscopic Surgeons (SAGES), Nashville, Tennessee, USA, 18–19 April 1994 相似文献
22.
F M Jacobsen D A Sack T A Wehr S Rogers N E Rosenthal 《Archives of general psychiatry》1987,44(12):1086-1091
A double-blind random-ordered comparison of the effects of placebo and 5-hydroxytryptophan (200 mg, orally) in ten depressed patients with seasonal affective disorder (SAD) and ten controls disclosed slightly but significantly higher basal levels of serum prolactin and a trend toward higher basal levels of serum cortisol in the patients with SAD compared with controls. After administration of 5-HTP, the cortisol level significantly increased and the prolactin level significantly decreased in both patients and controls. No differences in the melatonin level, growth hormone level, blood pressure, or pulse rate and no side effects were noted between patients and controls in the two study conditions; the timing of basal and 5-hydroxytryptophan-stimulated hormonal secretions was similar for both groups. These results are discussed with reference to current hypotheses of the cause of SAD. 相似文献
23.
In the neonatal period ultrasound and hepatobiliary functional scintigraphy are used to diagnose choledochal cysts. Initial sonography demonstrates hepatobiliary anatomy, hepatobiliary function is assessed by subsequent scintigraphy. The diagnosis can be confirmed by additional computed tomography as shown in this case report. 相似文献
24.
Analysis of daily self-ratings of energy for 10 patients diagnosed with seasonal affective disorder (SAD) revealed statistically significant seasonal patterns in eight patients (with all patients showing the most energy in the summer and the least energy in the winter). When weather was controlled for, the seasonal patterns in energy persisted in seven of the eight patients. In a lesser number of subjects (four), there were significant effects of weather after controlling for season; however, when the effects of weather on energy were examined separately for each season, 8 of the 10 subjects were found to be influenced by weather in at least one season. Daily sleep data showed statistically significant seasonal patterns in all 10 patients (with 6 subjects showing maximum sleep in winter and 4 in summer). As for the relationship between energy and sleep, a loss of energy appeared to predict longer sleep on that night and the next night (7 of 10 patients), whereas there was no evidence that prolonged sleep influenced energy on the following and subsequent days. 相似文献
25.
26.
27.
28.
29.
Daniel Rosenthal M.D. 《Diseases of the colon and rectum》1988,31(11):906-906
30.