全文获取类型
收费全文 | 1259篇 |
免费 | 100篇 |
国内免费 | 19篇 |
专业分类
耳鼻咽喉 | 2篇 |
儿科学 | 87篇 |
妇产科学 | 5篇 |
基础医学 | 151篇 |
口腔科学 | 63篇 |
临床医学 | 135篇 |
内科学 | 240篇 |
皮肤病学 | 51篇 |
神经病学 | 32篇 |
特种医学 | 261篇 |
外科学 | 110篇 |
综合类 | 30篇 |
预防医学 | 64篇 |
眼科学 | 23篇 |
药学 | 51篇 |
1篇 | |
肿瘤学 | 72篇 |
出版年
2022年 | 8篇 |
2021年 | 17篇 |
2020年 | 13篇 |
2019年 | 13篇 |
2018年 | 20篇 |
2017年 | 10篇 |
2016年 | 14篇 |
2015年 | 29篇 |
2014年 | 30篇 |
2013年 | 49篇 |
2012年 | 40篇 |
2011年 | 31篇 |
2010年 | 57篇 |
2009年 | 63篇 |
2008年 | 36篇 |
2007年 | 38篇 |
2006年 | 35篇 |
2005年 | 37篇 |
2004年 | 16篇 |
2003年 | 29篇 |
2002年 | 25篇 |
2001年 | 17篇 |
2000年 | 7篇 |
1999年 | 22篇 |
1998年 | 82篇 |
1997年 | 76篇 |
1996年 | 61篇 |
1995年 | 53篇 |
1994年 | 39篇 |
1993年 | 45篇 |
1992年 | 9篇 |
1991年 | 28篇 |
1990年 | 17篇 |
1989年 | 43篇 |
1988年 | 41篇 |
1987年 | 28篇 |
1986年 | 20篇 |
1985年 | 19篇 |
1984年 | 10篇 |
1983年 | 15篇 |
1982年 | 14篇 |
1981年 | 14篇 |
1980年 | 15篇 |
1979年 | 5篇 |
1978年 | 14篇 |
1977年 | 16篇 |
1976年 | 17篇 |
1975年 | 10篇 |
1971年 | 5篇 |
1970年 | 5篇 |
排序方式: 共有1378条查询结果,搜索用时 14 毫秒
81.
Dr. M. Teske 《Der Gyn?kologe》2009,42(8):604-608
A patient’s right to self-determination for practicing medical measures is extensive. Limitations exist, however, in borderline areas, e.g. in demanding active euthanasia by a doctor. This article discusses the penal limits of death on demand (§216 Penal Code), whereby criminally relevant behavior of a doctor is placed in contrast to a (still) permitted euthanasia. A special chapter deals with the limits of the right to self-determination for severely impaired newborns. Finally, reform attempts will be presented as long as these will lead to a strengthening of the right to self-determination of the patient for a dignified death. 相似文献
82.
83.
Wolfram Teske Sonja Zirke Jan Nottenk?mper Thomas Lichtinger Theodoros Theodoridis Jürgen Kr?mer Klaus Schmidt 《European spine journal》2011,20(4):537-541
Herniated intervertebral disc causes in a great number of cases of lumbar nerve root compression, especially in the segment
L5/S1. Other reasons responsible for stress to the lumbar spinal root are the spinal canal stenosis and the postdiscotomy
syndrome. For patients without neurological deficiencies, the conservative treatment includes different epidural injection
techniques. Steroids are often applied. A specific injection technique needing only a small drug amount is the epidural perineural
approach using a special two-needle technique. The anatomical spaces of the nerve roots have received little attention in
therapy. We have determined the anterolateral epidural space nerve volume of the nerve root L5/S1, and compared the data collected
in an anatomical study with operative measurements during discectomy. The volume determination in the human cadavers was performed
with liquid silicone filling the anterolateral space after dissection. The in vivo measurements were performed during surgery
at the site of the anterolateral space after discectomy. The anatomical studies showed us a mean value volume of 1.1 ml. The
surgical volume determinations result in a mean volume of 0.9 ml. A better understanding of the anterolateral epidural space
may allow a reduction of the injection volume in the conservative nerve root compression treatment, especially using the epidural
perineural technique, avoiding the risk of side effects of high doses of steroids. 相似文献
84.
Omar Hayani Lyall AJ Higginson Baldwin Toye Ian G Burwash 《The Canadian journal of cardiology》2009,25(4):e130-e132
Infective endocarditis caused by zoonotic microorganisms is an uncommon clinical entity. A 55-year-old man was diagnosed with endocarditis due to Capnocytophaga canimorsus, a commensal bacterium contained in the saliva of dogs, that involved the aortic and tricuspid valves and was complicated by a para-aortic valve abscess and aorta-to-right atrial fistula. The patient was successfully treated with antibiotic therapy and surgical intervention. C canimorsus endocarditis should be considered in patients with culture-negative endocarditis, particularly in immunosuppressed, asplenic or alcoholic individuals who have recently suffered a dog bite or have had close contact with dogs. 相似文献
85.
86.
After the introduction of the colposcope for the examination of children suspected of being sexually abused in Leeds, a study was undertaken to describe the findings in detail. A total of 109 consecutive prepubertal girls, mean age 70.4 months were assessed including colposcopic genital and anal examination, and peer group review of reports and photographs. Fifty nine children had signs consistent with blunt force penetrating trauma (hymenal transection/major notch, scar, or hymenal attenuation). Transections were encountered most commonly at 6 o'clock (directly posterior). In 46 the hymenal orifice was gaping with thigh abduction only and in 47 the hymenal orifice transverse diameter was greater than 4 mm on labial separation. Overall, physical findings were commonly present and in only two cases were no signs recorded. Non-specific and frequent findings included patterns of labial and introital reddening. Supportive hymenal signs including swelling, rounding of edge, thickening, distortion, and loss of symmetry were common. Labial fusion was present in 20. Urethral dilatation with labial separation was noted in 14. Physical findings including normality are consistent with abuse and even minor anogenital signs as well as negative findings should be documented. Colposcopy and photography are valuable tools in peer review, teaching, and case management. 相似文献
87.
AJ Blethyn HR Jenkins R Roberts K Verrier Jones 《Archives of disease in childhood》1995,73(6):534-535
Little objective evidence has been published to support the claim that constipation is an important contributory factor in recurrent urinary tract infection (UTI) in childhood. Using a radiological scoring system, two observers assessed faecal loading from abdominal radiographs of children with proved UTIs. There was a significant increase in the degree of faecal loading in children with UTI when compared with controls (r = 0.237). This difference was mainly accounted for by girls with recurrent (greater than five) UTIs. This study confirms an association between recurrent UTI and faecal loading. Further studies are needed to establish if there is a causal relationship and benefits from treatment. 相似文献
88.
89.
Allwine KJ Thistle HW Teske ME Anhold J 《Environmental toxicology and chemistry / SETAC》2002,21(5):1085-1090
The coupling of the valley drift (VALDRIFT) atmospheric dispersion/deposition model with the agricultural dispersal (AGDISP) aircraft wake model generates a modeling system for predicting the off-target drift of pesticides sprayed in a mountain valley. The approach uses the AGDISP near-field spray model to estimate the mass fraction of pesticide remaining airborne after initial application, then the VALDRIFT complex terrain model to estimate the drift of pesticide from the target area. The modeling system inputs include detailed spray information, a measure (or estimate) of winds in the valley, and the valley topographic characteristics; the results are pesticide concentrations throughout the valley atmosphere and pesticide deposition to the valley surface. The AGDISP and VALDRIFT models are operated independently, with the results from AGDISP being used as input to VALDRIFT through user-created data files. The modeling system was evaluated using pesticide drift data from spray trials conducted in the Mill Creek Canyon of Utah's Wasatch Mountains, USA, during the late spring of 1993. The predicted deposition compared within a factor of three of the observations (70% of the time) at all sampling locations extending several kilometers down-valley from the spray treatment block. The overall average ratio of predicted-to-observed deposition was 0.9. 相似文献
90.
Canine osteosarcoma, the most common bone tumor in dogs, is a well-established, naturally-occurring animal model for human OS. The aim of this study was to evaluate the clinical and hematological side-effects and to assess the efficacy of lobaplatin chemotherapy in dogs with appendicular osteosarcoma as an adjuvant therapy to surgical resection. Twenty-eight dogs without systemic signs of disease were treated with surgical resection of the tumor and adjuvant lobaplatin chemotherapy at a dose of 35 mg/m2, i.v., once every three weeks, for a maximum of 4 doses. Clinical signs of toxicosis were uncommon and consisted mainly of vomiting and depression. Hematological signs of toxicoses were common 7 to 10 days after lobaplatin chemotherapy and consisted of thrombocytopenia, leukopenia and neutropenia. All the signs were transient and most disappeared within three weeks of lobaplatin administration. A one-year disease-free fraction of 21.8% and a one-year survival fraction of 31.8% were calculated. Multivariate Cox regression analyses showed that a high histological tumor grade and presence of metastasis in the tumor vessels were associated with significantly shorter disease-free interval and survival time. Also, an increased pretreatment plasma alkaline phosphatase level at first presentation and a high histological level of tumor necrosis were associated with a shorter survival interval. Lobaplatin was easy to administer as an i.v. bolus injection at a three-week interval in dogs without the need for pretreatment infusions. 相似文献