全文获取类型
收费全文 | 1693752篇 |
免费 | 126389篇 |
国内免费 | 3780篇 |
专业分类
耳鼻咽喉 | 21731篇 |
儿科学 | 55665篇 |
妇产科学 | 46167篇 |
基础医学 | 241284篇 |
口腔科学 | 48783篇 |
临床医学 | 151514篇 |
内科学 | 333871篇 |
皮肤病学 | 38716篇 |
神经病学 | 131157篇 |
特种医学 | 63868篇 |
外国民族医学 | 242篇 |
外科学 | 257362篇 |
综合类 | 38950篇 |
现状与发展 | 4篇 |
一般理论 | 545篇 |
预防医学 | 124294篇 |
眼科学 | 40238篇 |
药学 | 123735篇 |
7篇 | |
中国医学 | 4475篇 |
肿瘤学 | 101313篇 |
出版年
2021年 | 12782篇 |
2019年 | 13522篇 |
2018年 | 19950篇 |
2017年 | 15215篇 |
2016年 | 16618篇 |
2015年 | 18964篇 |
2014年 | 26216篇 |
2013年 | 37968篇 |
2012年 | 52734篇 |
2011年 | 55419篇 |
2010年 | 32784篇 |
2009年 | 30714篇 |
2008年 | 51531篇 |
2007年 | 54807篇 |
2006年 | 55271篇 |
2005年 | 52543篇 |
2004年 | 50740篇 |
2003年 | 48149篇 |
2002年 | 46367篇 |
2001年 | 91797篇 |
2000年 | 93615篇 |
1999年 | 77002篇 |
1998年 | 19772篇 |
1997年 | 17338篇 |
1996年 | 17466篇 |
1995年 | 16787篇 |
1994年 | 15328篇 |
1993年 | 14108篇 |
1992年 | 57416篇 |
1991年 | 55300篇 |
1990年 | 53009篇 |
1989年 | 50783篇 |
1988年 | 46166篇 |
1987年 | 44969篇 |
1986年 | 42259篇 |
1985年 | 40013篇 |
1984年 | 29374篇 |
1983年 | 24936篇 |
1982年 | 13921篇 |
1979年 | 25552篇 |
1978年 | 17585篇 |
1977年 | 14926篇 |
1976年 | 13892篇 |
1975年 | 14581篇 |
1974年 | 17638篇 |
1973年 | 16949篇 |
1972年 | 15683篇 |
1971年 | 14465篇 |
1970年 | 13449篇 |
1969年 | 12528篇 |
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
961.
Reported in this paper are postoperative results recorded from 120 patients, 3 years after selective proximal vagotomy for uncomplicated duodenal ulcer. There was no intraoperative lethality and no recurrence in 96.7 per cent of all cases, while Visick grades I on II were recorded from 98.2 per cent. Radiologically and gastroscopically detected pathological processes receded soon. Average postoperative reduction in acid secretion was 66.2 per cent in BAO and 46.8 per cent in MAO. Acid values re-increased thereafter, and three years later reduction rates still amounted to 43.7 per cent in BAO and 28.6 per cent in MAO. Indications for proximal gastric vagotomy are discussed in some detail. 相似文献
962.
963.
Experience with the 'skew flap' below-knee amputation 总被引:3,自引:0,他引:3
A review of 353 lower limb amputations over the last 7 years has been performed to assess the results of the skew flap myoplastic below-knee amputation which was introduced in April 1983 because of reported advantages in terms of wound healing and earlier ambulation. Comparing the first 3 1/2 year period with the second, the total number of amputations decreased by 31 per cent. The number of above-knee amputations remained similar in the two periods (82,62), whilst the number of Gritti-Stokes amputations fell from 79 to 21 (0.001 greater than P greater than 0.01). The proportion of below-knee (BK) amputations increased from 50 (23.7 per cent) to 59 (41.5 per cent) (0.01 greater than P greater than 0.025). The groups were comparable in terms of previous vascular surgery and co-existing medical conditions. The time to full stump healing was significantly shorter in the skew flap group compared with the earlier Burgess type BK amputation (P = 0.001), and there was a trend to fewer stump failures in the skew flap group. We therefore feel that the skew flap amputation gives superior results to the Burgess BK amputation in terms of healing and a lower complication rate, allowing a higher proportion of BK amputations to be performed. A prospective randomized trial of the two techniques is in hand to determine the accuracy of this hypothesis. 相似文献
964.
Topical analgesia for relief of post-circumcision pain 总被引:1,自引:0,他引:1
965.
966.
Three evaluation instruments (global, check-list, and criterion referenced) were used by experienced and inexperienced examiners to evaluate dental sealant end products on 40 extracted teeth. Intra- and interexaminer reliabilities were measured. Experienced examiners achieved higher intrarater reliabilities with all three evaluation instruments than did inexperienced examiners. The highest intraexaminer agreement for all examiners occurred with use of the global evaluation. The highest interexaminer reliability was achieved with the second use of the criterion-referenced evaluation by the experienced examiner. Interexaminer reliability was improved for both types of examiners with the criterion-referenced evaluation. 相似文献
967.
A 65-year-old man with spontaneous rupture of the esophagus survived with a direct suture of the esophagus 15 hours after the onset of symptoms. Endoscopic examination of the esophagus was especially of great help in determining the surgical procedure in this patient, and we want to stress the importance of prompt diagnosis and immediate surgery for this disease. 相似文献
968.
969.
970.
To investigate the simultaneous effects of dexamethasone on peripheral and central adrenocorticotropic hormone (ACTH) systems, rats were treated with dexamethasone or saline for 4 days. Pituitary, plasma, hypothalamus and cerebrospinal fluid (CSF) were then collected and analyzed for ACTH immunoreactivity. Additionally, hypothalamic tissue extracts were analyzed for corticotropin-releasing hormone (CRH) immunoreactivity. Dexamethasone significantly lowered peripheral levels of ACTH as measured in pituitary and plasma. Hypothalamic ACTH content significantly increased while CSF ACTH significantly decreased with dexamethasone treatment. Hypothalamic CRH concentrations showed a small but statistically insignificant decrease. These results suggest that prolonged exposure to dexamethasone affects central as well as peripheral ACTH activity, corroborate our previous findings in rhesus monkeys of decreased CSF ACTH in response to prolonged dexamethasone treatment, suggest that dexamethasone may inhibit the release of ACTH from hypothalamic neurons into the CSF, and provide evidence that the effect of dexamethasone on pituitary ACTH content is of greater magnitude than its effect on hypothalamic CRH. 相似文献