全文获取类型
收费全文 | 782篇 |
免费 | 80篇 |
国内免费 | 16篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 45篇 |
妇产科学 | 5篇 |
基础医学 | 125篇 |
口腔科学 | 8篇 |
临床医学 | 79篇 |
内科学 | 156篇 |
皮肤病学 | 31篇 |
神经病学 | 30篇 |
特种医学 | 231篇 |
外科学 | 44篇 |
综合类 | 36篇 |
一般理论 | 1篇 |
预防医学 | 28篇 |
眼科学 | 6篇 |
药学 | 20篇 |
中国医学 | 1篇 |
肿瘤学 | 29篇 |
出版年
2023年 | 1篇 |
2022年 | 3篇 |
2021年 | 9篇 |
2020年 | 8篇 |
2019年 | 2篇 |
2018年 | 11篇 |
2017年 | 7篇 |
2016年 | 14篇 |
2015年 | 13篇 |
2014年 | 7篇 |
2013年 | 18篇 |
2012年 | 13篇 |
2011年 | 17篇 |
2010年 | 19篇 |
2009年 | 27篇 |
2008年 | 20篇 |
2007年 | 26篇 |
2006年 | 17篇 |
2005年 | 28篇 |
2004年 | 13篇 |
2003年 | 32篇 |
2002年 | 22篇 |
2001年 | 8篇 |
2000年 | 12篇 |
1999年 | 17篇 |
1998年 | 49篇 |
1997年 | 51篇 |
1996年 | 43篇 |
1995年 | 25篇 |
1994年 | 44篇 |
1993年 | 29篇 |
1992年 | 7篇 |
1991年 | 14篇 |
1990年 | 9篇 |
1989年 | 29篇 |
1988年 | 24篇 |
1987年 | 21篇 |
1986年 | 26篇 |
1985年 | 15篇 |
1984年 | 16篇 |
1983年 | 12篇 |
1982年 | 13篇 |
1981年 | 26篇 |
1980年 | 7篇 |
1979年 | 9篇 |
1978年 | 10篇 |
1977年 | 10篇 |
1976年 | 13篇 |
1975年 | 10篇 |
1968年 | 1篇 |
排序方式: 共有878条查询结果,搜索用时 0 毫秒
1.
2.
Intestinal schistosomiasis japonica: CT-pathologic correlation 总被引:1,自引:0,他引:1
Lee RC; Chiang JH; Chou YH; Rubesin SE; Wu HP; Jeng WC; Hsu CC; Tiu CM; Chang T 《Radiology》1994,193(2):539
3.
4.
Laura A Hawryluck William RC Harvey Louise Lemieux-Charles Peter A Singer 《BMC medical ethics》2002,3(1):3-9
Background
Intensivists must provide enough analgesia and sedation to ensure dying patients receive good palliative care. However, if it is perceived that too much is given, they risk prosecution for committing euthanasia. The goal of this study is to develop consensus guidelines on analgesia and sedation in dying intensive care unit patients that help distinguish palliative care from euthanasia.Methods
Using the Delphi technique, panelists rated levels of agreement with statements describing how analgesics and sedatives should be given to dying ICU patients and how palliative care should be distinguished from euthanasia. Participants were drawn from 3 panels: 1) Canadian Academic Adult Intensive Care Fellowship program directors and Intensive Care division chiefs (N = 9); 2) Deputy chief provincial coroners (N = 5); 3) Validation panel of Intensivists attending the Canadian Critical Care Trials Group meeting (N = 12).Results
After three Delphi rounds, consensus was achieved on 16 statements encompassing the role of palliative care in the intensive care unit, the management of pain and suffering, current areas of controversy, and ways of improving palliative care in the ICU.Conclusion
Consensus guidelines were developed to guide the administration of analgesics and sedatives to dying ICU patients and to help distinguish palliative care from euthanasia. 相似文献5.
RC Curran 《Journal of clinical pathology》1983,36(2):239-240
6.
7.
8.
9.
Preliminary report of an ultrasonography and colour Doppler uterine score to predict uterine receptivity in an in-vitro fertilization programme 总被引:1,自引:4,他引:1
Salle B; Bied-Damon V; Benchaib M; Desperes S; Gaucherand P; Rudigoz RC 《Human reproduction (Oxford, England)》1998,13(6):1669-1673
A total of 96 women undergoing in-vitro fertilization (IVF) treatment were
examined by transvaginal ultrasonography with colour and pulsed Doppler
ultrasound on the 22nd day of the menstrual cycle preceding IVF. We
assessed endometrial thickness, endometrial morphology, myometrial
echogenicity, subendometrial vascularization, the uterine artery
pulsatility index, protodiastolic notch and end diastolic blood flow in
order to define a uterine score which could be correlated with the
pregnancy rate. The overall pregnancy rate was 30.2%, and there was no
difference between the pregnant and non-pregnant groups with regard to any
of the ultrasonographic and Doppler parameters when examined separately.
However, the uterine score was significantly higher in the pregnant group
(15.9 +/- 2.81 versus 12.7 +/- 5.3, P = 0.002; t-test). No pregnancy
occurred if the score was between 0 and 10. With a score of 11-15 there was
a 34.7% chance of pregnancy, and scores >16 had a 42% chance of
pregnancy. In conclusion, individual ultrasonographic and Doppler
parameters are not of sufficient accuracy to predict uterine receptivity.
The uterine score calculated prior to IVF cycles appears to be a useful
predictor of implantation.
相似文献
10.
Coding haplotype analysis supports HCR as the putative susceptibility gene for psoriasis at the MHC PSORS1 locus 总被引:13,自引:0,他引:13
Asumalahti K Veal C Laitinen T Suomela S Allen M Elomaa O Moser M de Cid R Ripatti S Vorechovsky I Marcusson JA Nakagawa H Lazaro C Estivill X Capon F Novelli G Saarialho-Kere U Barker J Trembath R Kere J;Psoriasis Consortium 《Human molecular genetics》2002,11(5):589-597
PSORS1, near HLA-C, is the major genetic determinant of psoriasis. We present genetic and structural evidence suggesting a major role for the HCR gene at the PSORS1 locus. Genotyping of 419 families from six populations revealed that coding single-nucleotide polymorphisms of HCR formed a conserved allele HCR*WWCC that associated highly significantly with psoriasis and with the HLA-Cw6 allele in all populations. Because of strong linkage disequilibrium between HLA-Cw6 and HCR*WWCC, the two genes could not be genetically distinguished by this sample size. However, the variant HCR allele was predicted to differ in secondary structure from the wild-type protein. HCR protein expression in lesional psoriatic skin differed considerably from that observed in normal skin. These results provide strong evidence for the HCR*WWCC allele as a major genetic determinant for psoriasis, probably by a mechanism impacting on keratinocyte proliferation. 相似文献