全文获取类型
收费全文 | 351932篇 |
免费 | 23009篇 |
国内免费 | 7827篇 |
专业分类
耳鼻咽喉 | 4106篇 |
儿科学 | 10151篇 |
妇产科学 | 6860篇 |
基础医学 | 28737篇 |
口腔科学 | 8012篇 |
临床医学 | 38619篇 |
内科学 | 45501篇 |
皮肤病学 | 4684篇 |
神经病学 | 20973篇 |
特种医学 | 8251篇 |
外国民族医学 | 32篇 |
外科学 | 37566篇 |
综合类 | 51564篇 |
现状与发展 | 13篇 |
一般理论 | 34篇 |
预防医学 | 35832篇 |
眼科学 | 5356篇 |
药学 | 30906篇 |
387篇 | |
中国医学 | 30814篇 |
肿瘤学 | 14370篇 |
出版年
2023年 | 5720篇 |
2022年 | 10084篇 |
2021年 | 13792篇 |
2020年 | 12922篇 |
2019年 | 18731篇 |
2018年 | 16258篇 |
2017年 | 13107篇 |
2016年 | 10608篇 |
2015年 | 9945篇 |
2014年 | 20375篇 |
2013年 | 22020篇 |
2012年 | 18589篇 |
2011年 | 20152篇 |
2010年 | 16206篇 |
2009年 | 14964篇 |
2008年 | 14623篇 |
2007年 | 15006篇 |
2006年 | 13116篇 |
2005年 | 11403篇 |
2004年 | 9330篇 |
2003年 | 8242篇 |
2002年 | 6488篇 |
2001年 | 5830篇 |
2000年 | 4840篇 |
1999年 | 4220篇 |
1998年 | 3466篇 |
1997年 | 3314篇 |
1996年 | 2857篇 |
1995年 | 2760篇 |
1994年 | 2639篇 |
1993年 | 2106篇 |
1992年 | 2140篇 |
1991年 | 1838篇 |
1990年 | 1633篇 |
1989年 | 1458篇 |
1988年 | 1379篇 |
1987年 | 1182篇 |
1985年 | 3846篇 |
1984年 | 4855篇 |
1983年 | 3375篇 |
1982年 | 3827篇 |
1981年 | 3561篇 |
1980年 | 3168篇 |
1979年 | 2916篇 |
1978年 | 2546篇 |
1977年 | 1918篇 |
1976年 | 2157篇 |
1975年 | 1639篇 |
1974年 | 1430篇 |
1973年 | 1283篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
A Kacalak-Rzepka† E Zaluga† R Maleszka† A Królicki† A Klimowicz‡ 《Journal of the European Academy of Dermatology and Venereology》2004,18(4):490-494
We report the case of a 44-year-old male with a 10-year history of manifestations of the rare form of bullous systemic lupus erythematosus (SLE) with coexisting antiphospholipid syndrome (APS) that remained undiagnosed until thrombotic-embolic episodes appeared and high titres of anticardiolipin (ACL) antibodies were detected. The patient fulfilled the criteria for SLE and the atypical cutaneous manifestations together with histopathological changes and a favourable response to sulphones were the grounds for the diagnosis of the bullous variety of SLE. Treatment with prednisolone, acenocoumarol and dapsone resulted in marked clinical improvement, reduction in antinuclear antibodies (ANAs) and normalization of ACL antibody titres. 相似文献
82.
Summary Methods in current practice for ascertaining time of death are largely based on the cooling of the body after death and are
somewhat unreliable. A theoretica relationship is known to exist between the decline in the properties defining nerve conduction
and time after death caused by the gradual cessation of metabolic activity in nerves. A number of such properties were measured
in rats during life and after death. In most cases the relationship was found to be inconsistent. The chronaxie of the strength
duration curve for the sciatic nerve was, however, found to increase consistently and reproducibly in a linear fashion over
the first 90 min after death to a plateau value which was maintained beyond 135 min. These findings are discussed as the possible
basis of a forensic method of determining the duration of the “post mortem interval” within the first few hours after death.
相似文献
83.
经临床鉴定静脉内注射小儿氨基酸对治疗胎儿宫内发育迟缓具有肯定效果。在B超监视下,使用小儿氨基酸的孕妇组于用药期间,胎儿生长参数BPD和HC显著高于使用成人氨基酸的孕妇组。10例足月娩出胎儿体重均达到甚至超过2.5kg。由此得出结论:使用小儿氨基酸注射液对于改善胎儿宫内发育迟缓优于成人氨基酸。 相似文献
84.
85.
C. Kasper A. Terhaar A. Foss A. Welt S. Seeber M. R. Nowrousian 《European journal of haematology》1997,58(4):251-256
Abstract: The efficacy and safety of recombinant human erythropoietin (rhEPO) were tested when given subcutaneously (s.c.) in an escalating dose of 2000–10,000 units (U) daily in 60 patients with cancer-related anaemia (CRA). A positive response, defined as an increase in haemoglobin more than 2 g/dl and independence of blood transfusions, was observed in 23 of 48 evaluable patients (48%) within a median of 8 wk. In detail, rhEPO corrected anaemia in 11 of 14 patients (79%) with malignant lymphoma, in 8 of 15 patients (53%) with multiple myeloma and in 4 of 10 patients (40%) with a solid tumour. The median dose of rhEPO in successful cases was 5000 U daily. Four patients with agnogenic myeloid metaplasia and 5 with myelodysplastic disorder failed to respond to rhEPO. No patient had any severe side effects. Pretreatment serum erythropoietin levels appeared to be a weak predictor for response to rhEPO treatment. In conclusion, rhEPO seems to be safe and effective in correcting CRA in certain groups of patients. 相似文献
86.
J. B. DILAWARI N. NAGPAL Y. K. CHAWLA U. KAUR J. VERMA H. BALI K. M. DAS S. SURI 《Journal of gastroenterology and hepatology》1993,8(2):202-205
Hepatic venous outflow tract obstruction, Budd-Chiari syndrome (BCS), leads to portal hypertension and to the development of collaterals that bypass the obstruction. Described here is a BCS patient with an unusually large transdiaphragmatic collateral between the left hepatic and left innominate veins, which decompressed the oesophageal varices. This has not been reported earlier in the literature. 相似文献
87.
Eichi Itadera Yoshimasa Miyake Yoichi Nakatsuka Hirofumi Akazawa Shigeru Mitani Kiyoshi Aoki 《Journal of orthopaedic science》1996,1(4):252-258
We report satisfactory results with a new operative treatment, conducted via an extensive anterolateral approach, involving
360 degree circumferential capsulotomy, for residual subluxation in congenital dislocation of the hip (CDH). Long-term radiographic
results of this procedure (group A) were compared retrospectively with the results of partial capsulotomy (group B), which
preserved the posteroinferior joint capsule. The mean center edge angle in group A (22.5°) was greater than that in group
B (16.0°). Satisfactory results were achieved in 11 of 15 hips (73%) (Severin class I or II) in group A, and in 5 of 12 hips
(42%) in group B. These results suggest that whole circumferential capsulotomy can remove obstacles to complete reduction,
and that acetabular development can be expected in hips reduced by the procedure, without the performance of innominate osteotomy.
We believe that our technique is a useful alternative for the treatment of residual subluxation in CDH. 相似文献
88.
A. T. McWILLIAMS 《Medical education》1988,22(2):99-103
Medical students are allocated little curriculum time for exposure to expert systems. ESTA, a computer model of an expert system, was developed to make best use of this time. The nature of the students' interaction with ESTA is described, and their reactions to the expert system concepts and the place of expert systems in medicine are presented. A discussion of these reactions draws some conclusions about teaching expert systems in particular, and computers in general, in the basic medical course. 相似文献
89.
D. I. NEWBLE 《Medical education》1988,22(3):200-204
A structured clinical examination has been an integral component of the final-year examinations conducted by the Departments of Medicine and Surgery at the University of Adelaide for the last 8 years. It has been used as an alternative to the traditional clinical examination. This paper describes the results of ongoing student and examiner surveys carried out to determine their views and satisfaction with this new approach. It also briefly discusses the feasibility of introducing such an examination into a conventional medical school environment. The surveys showed a remarkable level of acceptance and support by both students and examiners. This positive reaction has been maintained over the 8-year period. The main reasons seem to be its perceived relevance and fairness. Students also appear to be directing their learning in a direction thought desirable by teachers. No significant problems have been encountered with the practical implementation of the method. 相似文献
90.
200例择期胆囊切除+术中胆道造影患者分二组;芬太尼17ug/kg静注(F组,n=100)、哌替啶1mg/kg静注。评价两种麻醉性镇痛药致Oddi括约肌痉挛的发生率,结果:8例病人造影剂不能通过Oddi括约肌、十二指肠不显影,胆总管下端显示“鸟嘴样”或“假结石”影像,后者3例病人胆总管探查阴性,静注纳络酮0.4mg后,全部病例造影剂顺利进入十二指肠。结论:硬膜外麻醉辅用小剂量芬太尼/哌替啶时Odd 相似文献