全文获取类型
收费全文 | 1286篇 |
免费 | 124篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 3篇 |
儿科学 | 52篇 |
妇产科学 | 45篇 |
基础医学 | 167篇 |
口腔科学 | 7篇 |
临床医学 | 111篇 |
内科学 | 365篇 |
皮肤病学 | 9篇 |
神经病学 | 84篇 |
特种医学 | 28篇 |
外国民族医学 | 3篇 |
外科学 | 105篇 |
综合类 | 37篇 |
一般理论 | 1篇 |
预防医学 | 234篇 |
眼科学 | 8篇 |
药学 | 63篇 |
肿瘤学 | 89篇 |
出版年
2021年 | 19篇 |
2020年 | 13篇 |
2019年 | 18篇 |
2018年 | 14篇 |
2017年 | 13篇 |
2015年 | 16篇 |
2014年 | 17篇 |
2013年 | 25篇 |
2012年 | 44篇 |
2011年 | 43篇 |
2010年 | 32篇 |
2009年 | 17篇 |
2008年 | 40篇 |
2007年 | 34篇 |
2006年 | 51篇 |
2005年 | 45篇 |
2004年 | 48篇 |
2003年 | 54篇 |
2002年 | 48篇 |
2001年 | 49篇 |
2000年 | 50篇 |
1999年 | 49篇 |
1998年 | 15篇 |
1997年 | 18篇 |
1996年 | 22篇 |
1995年 | 13篇 |
1994年 | 18篇 |
1993年 | 10篇 |
1992年 | 32篇 |
1991年 | 48篇 |
1990年 | 35篇 |
1989年 | 48篇 |
1988年 | 32篇 |
1987年 | 26篇 |
1986年 | 32篇 |
1985年 | 21篇 |
1984年 | 27篇 |
1983年 | 33篇 |
1982年 | 22篇 |
1981年 | 20篇 |
1980年 | 12篇 |
1979年 | 29篇 |
1978年 | 18篇 |
1977年 | 18篇 |
1975年 | 13篇 |
1974年 | 13篇 |
1973年 | 22篇 |
1972年 | 10篇 |
1971年 | 9篇 |
1970年 | 11篇 |
排序方式: 共有1411条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
5.
6.
M R Howard J M Hows S M Gore J Barrett M K Brenner J M Goldman E C Gordon-Smith C Poynton H G Prentice J A Whittaker 《Transplantation》1990,49(3):547-553
Retrospectively we analyzed the histocompatibility data and clinical results of bone marrow transplantation in 51 patients who received marrow from unrelated donors (UD) from 1977 to 1987 at one of four UK BMT centers. We compared the results with those obtained in 51 transplants carried out at the same centers using HLA-identical (ID) sibling donors. Of the UD/recipient pairs 32 (63%) were serologically identical for HLA A, B, and DR antigens, and 37% showed varying degrees of mismatch. UD-BMT primary diagnoses were: severe aplastic anemia or Fanconi's anemia (n = 17), acute leukemia (n = 11), chronic myeloid leukemia (n = 21), and other conditions (n = 2). T cell depletion of the graft was associated with a significant improvement in survival in both UD and ID-BMT. Graft failure was more common in recipients of UD than of ID transplants (13 [25%] vs. 5 [10%] P = 0.05) but there was no significant difference in the frequency of acute or chronic graft-versus-host disease. Actuarial survival was superior for recipients of ID transplants (UD vs. ID: 49% vs. 78%, respectively, at 3 months; 32% vs. 63% at one year). Reduced survival for recipients of UD-BMT was confirmed in case control regression analysis (relative risk 3.0, P = 0.01). Nevertheless in patients whose only alternative is a partially mismatched family donor we think that UD-BMT is justified. 相似文献
7.
M. J. Goodrick A. G. Prentice J. A. Copplestone D. H. Pamphilon R. J. Boon 《Journal of clinical pathology》1992,45(4):352-353
A 71 year old man with chronic lymphocytic leukaemia (CLL) experienced excessive bleeding following transurethral resection of the prostate. Investigations showed a prolonged kaolin cephalin clotting time (KCCT) with low concentrations of factor XI. The prolonged KCCT was largely corrected by mixing with normal plasma but this correction was lost on incubation, confirming the presence of an inhibitor. He was treated with pulsed methylprednisolone and chlorambucil which resulted in the resolution of the bleeding problem and the loss of detectable circulating inhibitor. 相似文献
8.
Joking riddles of low, moderate, and high aggressive content were administered to 60 normal elementary school boys of average intelligence, categorized into three groups of 20 based on their characteristic defensive styles (constricted, flexible, and impulsive) of dealing with aggressive impulses. Both moderately and highly aggressive riddles were enjoyed more. Though no main effect for defensive style was found for either riddle enjoyment or comprehension, complex interactions among defensive style, level of aggression, and time of presentation emerged as significant. 相似文献
9.
Osteoporosis in severe congenital neutropenia treated with granulocyte colony-stimulating factor 总被引:2,自引:0,他引:2
N. J. Bishop D. M. Williams J. C. Compston D. M. Stirling A. Prentice 《British journal of haematology》1995,89(4):927-928
Recombinant human granulocyte colony-stimulating factor (G-CSF) has substantially improved life expectancy for children with severe congenital neutropenia (SCN). Severe osteoporosis, reported in this population, may relate to the disease process, or be a therapeutic side-effect. This report details bone loss, quantitated absorptiometrically and histomorphometrically, in a child with SCN and vertebral collapse, and the positive response to anabolic steroid and bisphosphonate therapy. 相似文献
10.
G R Goldberg A M Prentice H L Davies P R Murgatroyd 《European journal of clinical nutrition》1988,42(2):137-144
The FAO/WHO/UNU recommendations for energy requirements assume that the energy cost of sleep is equal to the basal metabolic rate (BMR). We have tested the validity of this assumption by analysing overnight and BMR measurements made by whole-body indirect calorimetry. Data from 80 healthy subjects measured on a total of 246 occasions have been used. In a subgroup of 40 normal lean subjects the mean ratio of overnight metabolic rate (Overnight MR): BMR was 0.95 (range 0.85 - 1.02, s.d. 0.04). The mean ratio of lowest sleeping metabolic rate (Lowest SMR): BMR was 0.88 (range 0.83 - 0.96, s.d. 0.04). Ratios of Overnight MR: BMR were not significantly affected by different levels of exercise on the preceding day. This ratio was significantly higher for subjects who were obese, late pregnant or attached to ECG electrodes. With the exception of the late pregnant subjects these groups had the same Lowest SMR:BMR ratios as the normal lean subjects, indicating that the higher Overnight MR was caused by disturbed sleep. The data suggest that the use of BMR to estimate overnight energy expenditure would introduce an average overestimate of approximately 5 per cent during the actual hours of sleep, but that when applied over 24 h the error becomes negligible. 相似文献