全文获取类型
收费全文 | 1712610篇 |
免费 | 127833篇 |
国内免费 | 3853篇 |
专业分类
耳鼻咽喉 | 21962篇 |
儿科学 | 56019篇 |
妇产科学 | 46394篇 |
基础医学 | 243960篇 |
口腔科学 | 49131篇 |
临床医学 | 153859篇 |
内科学 | 337950篇 |
皮肤病学 | 39038篇 |
神经病学 | 133113篇 |
特种医学 | 64509篇 |
外国民族医学 | 244篇 |
外科学 | 260160篇 |
综合类 | 39157篇 |
现状与发展 | 5篇 |
一般理论 | 540篇 |
预防医学 | 125591篇 |
眼科学 | 40535篇 |
药学 | 124940篇 |
7篇 | |
中国医学 | 4510篇 |
肿瘤学 | 102672篇 |
出版年
2021年 | 13277篇 |
2019年 | 14032篇 |
2018年 | 20525篇 |
2017年 | 15640篇 |
2016年 | 17066篇 |
2015年 | 19496篇 |
2014年 | 26936篇 |
2013年 | 38923篇 |
2012年 | 54218篇 |
2011年 | 57092篇 |
2010年 | 33579篇 |
2009年 | 31473篇 |
2008年 | 52792篇 |
2007年 | 56057篇 |
2006年 | 56443篇 |
2005年 | 53751篇 |
2004年 | 51839篇 |
2003年 | 49125篇 |
2002年 | 47367篇 |
2001年 | 91992篇 |
2000年 | 93798篇 |
1999年 | 77172篇 |
1998年 | 19916篇 |
1997年 | 17433篇 |
1996年 | 17504篇 |
1995年 | 16851篇 |
1994年 | 15380篇 |
1993年 | 14161篇 |
1992年 | 57521篇 |
1991年 | 55394篇 |
1990年 | 53095篇 |
1989年 | 50856篇 |
1988年 | 46245篇 |
1987年 | 45042篇 |
1986年 | 42340篇 |
1985年 | 40108篇 |
1984年 | 29442篇 |
1983年 | 24987篇 |
1982年 | 13976篇 |
1979年 | 25594篇 |
1978年 | 17637篇 |
1977年 | 14962篇 |
1976年 | 13918篇 |
1975年 | 14600篇 |
1974年 | 17674篇 |
1973年 | 16984篇 |
1972年 | 15714篇 |
1971年 | 14473篇 |
1970年 | 13455篇 |
1969年 | 12541篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
The distribution in renal tumours of 3-fucosyl-N-acetyl lactosamine has been studied by using the monoclonal antibodies AGF 4.36 and AGF 4.48 and immunoperoxidase methods on tissue sections. Seven of 19 nephroblastomas and 12 of 30 renal cell carcinomas contained the epitope. In nephroblastomas the epitope was found on the terminals of type B tubules in six cases and in one case on the type A or neoplastic tubules. In renal carcinoma the antigen was found on the surface of tumour cells. The results suggest that in kidneys bearing nephroblastomas ureteric bud elements may grow into the tumour from the adjacent kidney. 相似文献
992.
993.
S M Enright 《American journal of hospital pharmacy》1986,43(11):2849-2851
994.
995.
With the increased use of indwelling central venous catheters, increasing numbers of cases of Rhodotorula fungemia have been observed in patients with neoplasia and neutropenia. In most patients with catheter-related Rhodotorula fungemia, the condition has been treated with broadspectrum antibiotics. We report two cases of central venous catheter-related
Rhodotorula rubra fungemia that occurred in patients with acute myeloblastic leukemia. Both patients were in a state of neutropenia. One patient
was treated with amphotericin B and his central venous catheter was removed, but he died of Klebsiella pneumoniae bacteremia. The other patient was treated with amphotericin B and discharged, with a central venous catheter, after recovery
from neutropenia. Although the management of catheter-related Rhodotorula fungemia infections remains controversial, resolution of the underlying disease is more important than catheter removal for
recovery from Rhodotorula rubra fungemia.
Received: August 22, 2001 / Accepted: October 8, 2001 相似文献
996.
F. Berndsen D. Arvidsson L.-K. Enander C.-E. Leijonmarck U. Wingren C. Rudberg S. Smedberg G. Wickbom A. Montgomery 《Hernia》2002,6(2):56-61
Interest in inguinal hernia surgery has increased significantly with the introduction of new operating techniques during
the past decade. This multicenter study compared short-term results in patients treated by the laparoscopic transabdominal
preperitoneal patch technique (TAPP; n=518) and the Shouldice technique (n=524). We evaluated demographics, operative data, complications, hospital stay, postoperative pain, use of analgesics, functional
status, sick leave, and complaints up to 3 months postoperatively. The median operating time was shorter in the Shouldice
group (55 vs. 65 min), but there were no significant differences in complication rates, and major complications were rare.
The hospital stay was 1 day or less in over 98% of cases in both groups, but more operations were performed on outpatient
basis in the Shouldice group. In the TAPP group postoperative pain and analgesic consumption were less, postoperative functional
status was better, and sick leave was shorter (10 vs. 14 days). These results show that the two methods are equally safe and
have few major complications. The TAPP operation is associated with less postoperative pain, better postoperative functional
status, and shorter sick leave, but at the price of a longer operating time.
Electronic Publication 相似文献
997.
The carcinogenicity of dextran and 3 kinds of dextran sulfate sodium with different molecular weights and almost the same sulfur content were compared in ACI rats. Dextran sulfate sodium of molecular weight 54,000 showed a strong carcinogenic activity when it was given orally as 2.5% diet, whereas dextran sulfate sodium of molecular weight 520,000 and 9500 and dextran showed no significant carcinogenicity, i.e. the peak of carcinogenic activity of dextran sulfate sodium appeared at molecular weight 54,000, and dextran sulfates with larger or smaller molecular weights had no carcinogenic activity. 相似文献
998.
Sexual deviation disorders, or paraphilias, are diagnosable psychiatric syndromes manifested by 1) recurrent fantasies about deviant sex, 2) intense associated cravings, and 3) stereotypic behavioral responses. Pedophiles seek out children in response to their erotic thoughts and urges, whereas exhibitionists expose themselves. Paraphiliac syndromes ordinarily follow a chronic course and may be associated with biological pathology, but etiological factors are poorly understood. Treatment becomes a consideration when the well-being or rights of others are compromised. Proposed treatments have included psychotherapy, behavior therapy, surgery, and medication. Medroxyprogesterone acetate, which reduces testosterone, may diminish sexual preoccupation and urges, making self-control easier. 相似文献
999.
1000.
Esophageal pH monitoring is the accepted standard for the investigation of gastroesophageal reflux (GER) in adults. A postal questionnaire was sent to 912 United Kingdom paediatric physicians & surgeons. Five hundred forty-seven (61%) replied, with 124 (22.7%) currently using the technique, mostly in conjunction with barium swallow and/or esophagoscopy. The use of pH monitoring to quantify GER was also accepted in principal as being the best determinant of reflux by a further 186 (34%), but as yet was unavailable in their hospitals. Pediatricians were also questioned as to their management of children with GER. The majority were treated medically with a variety of antireflux medication, with only 237 (42%) referring cases for surgery. 相似文献