全文获取类型
收费全文 | 600篇 |
免费 | 48篇 |
国内免费 | 61篇 |
专业分类
耳鼻咽喉 | 1篇 |
儿科学 | 40篇 |
妇产科学 | 8篇 |
基础医学 | 86篇 |
口腔科学 | 16篇 |
临床医学 | 92篇 |
内科学 | 172篇 |
皮肤病学 | 14篇 |
神经病学 | 11篇 |
特种医学 | 87篇 |
外科学 | 31篇 |
综合类 | 20篇 |
预防医学 | 38篇 |
眼科学 | 4篇 |
药学 | 50篇 |
中国医学 | 2篇 |
肿瘤学 | 37篇 |
出版年
2023年 | 2篇 |
2022年 | 2篇 |
2021年 | 3篇 |
2020年 | 2篇 |
2019年 | 9篇 |
2018年 | 11篇 |
2017年 | 4篇 |
2016年 | 10篇 |
2015年 | 11篇 |
2014年 | 22篇 |
2013年 | 30篇 |
2012年 | 9篇 |
2011年 | 13篇 |
2010年 | 28篇 |
2009年 | 28篇 |
2008年 | 29篇 |
2007年 | 49篇 |
2006年 | 20篇 |
2005年 | 20篇 |
2004年 | 15篇 |
2003年 | 10篇 |
2002年 | 14篇 |
2001年 | 18篇 |
2000年 | 10篇 |
1999年 | 18篇 |
1998年 | 35篇 |
1997年 | 37篇 |
1996年 | 24篇 |
1995年 | 25篇 |
1994年 | 29篇 |
1993年 | 20篇 |
1992年 | 5篇 |
1991年 | 10篇 |
1990年 | 3篇 |
1989年 | 18篇 |
1988年 | 18篇 |
1987年 | 11篇 |
1986年 | 4篇 |
1985年 | 10篇 |
1984年 | 7篇 |
1983年 | 4篇 |
1982年 | 10篇 |
1981年 | 12篇 |
1980年 | 8篇 |
1978年 | 7篇 |
1977年 | 7篇 |
1976年 | 10篇 |
1975年 | 4篇 |
1966年 | 1篇 |
1957年 | 1篇 |
排序方式: 共有709条查询结果,搜索用时 15 毫秒
51.
Bram?Fioole Marike?Kokke Richard?van Hillegersberg Inne?HM?Borel RinkesEmail author 《BMC surgery》2005,5(1):7
Background
The purpose of this study was to evaluate the long-term results of partial liver resection for benign liver lesions. 相似文献52.
Annette?AM?GerritsenEmail author Inge?Bramsen Walter?Devillé Loes?HM?van Willigen Johannes?E?Hovens Henk?M?van der Ploeg 《BMC public health》2004,4(1):7
Background
This article discusses the design of a study on the prevalence of health problems (both physical and mental) and the utilisation of health care services among asylum seekers and refugees in the Netherlands, including factors that may be related to their health and their utilisation of these services. 相似文献53.
54.
55.
56.
1 病例报告 男,7岁.因双下肢不等长,右膝及右踝关节骨性肿大就诊.无明显外伤史,亦无红、肿、热、痛病史.查体:发育正常,营养良好.双下肢不等长,左60cm,右64cm,有跛行.右膝及右踝内侧肿大,肤色正常,关节活动无异常.X线:右侧半身诸关节(肩、肘、腕、髋、膝、踝)骨骺及干骺发育均较左侧增大,肢体较长,骨骺出现亦较对侧提早.如右尺骨茎突骨骺较左侧提早出现(图1).右肘关节肱骨小头骨骺较左侧增大(图2).右髋臼发育浅平,边缘毛糙,右股骨头骨骺较左侧明显增大,其距泪滴之距离较左侧大1.0cm,呈… 相似文献
57.
跟骨定量超声骨质测量参数与骨密度及骨组织形态计量学指标的关系 总被引:1,自引:0,他引:1
目的:分析跟骨定量超声骨质测量中各参数与骨密度及形态计量学指标的相关性。方法:选择2004-01/2005-12广州市第六人民医院和中山大学三院骨科小腿以上截肢患者38例,将其跟骨定量超声测定的超声振幅衰减平均值与健康青年人骨峰值进行比较,>-2.5 SD者为骨量正常组(12例),<-2.5 SD者为骨质疏松组(26例)。分别进行跟骨定量超声、双能X线骨密度测量仪及骨形态计量学测量,应用直线相关分析法分析跟骨定量超声测定中各参数与骨密度及骨组织形态计量学各指标的相关性。结果:38例全部进入结果分析。①骨质疏松组跟骨超声振幅衰减平均值和骨硬度指数值均小于骨量正常组(P<0.01)。②骨量正常组跟骨骨密度值显著高于骨质疏松组[(352±16),(233±14)mg/cm2,P<0.01]。③骨量正常组跟骨平均骨小梁间距或弥散度低于骨质疏松组而松质骨体积高于骨质疏松组(P<0.05)。④超声振幅衰减平均值和骨硬度指数与骨密度呈直线正相关(r=0.814,0.326,P<0.01,0.05)。⑤超声传播速度与骨小梁游离末端、平均骨小梁间距呈直线负相关(r=-0.688,-0.712,P<0.01),与小梁间连点数、松质骨体积呈直线正相关(r=0.672,0.794,P<0.01);骨硬度指数与平均骨小梁间距呈直线负相关(r=-0.358,P<0.05),与松质骨体积呈直线正相关(r=0.513,P<0.01)。结论:跟骨定量超声测量中,超声振幅衰减平均值能较好地反映骨的密度,超声传播速度能较好地反映骨的质量,而骨硬度指数能较综合地反映骨强度的改变。 相似文献
58.
Peter Henneman Femke van der Sman-de Beer Payman Hanifi Moghaddam Petra Huijts Anton FH Stalenhoef John JP Kastelein Cornelia M van Duijn Louis M Havekes Rune R Frants Ko Willems van Dijk Augustinus HM Smelt 《European journal of human genetics : EJHG》2009,17(5):620-628
Type III hyperlipoproteinemia (HLP) is mainly found in homozygous apolipoprotein (APO) E2 (R158C) carriers. Genetic factors contributing to the expression of type III HLP were investigated in 113 hyper- and 52 normolipidemic E2/2 subjects, by testing for polymorphisms in APOC3, APOA5, HL (hepatic lipase) and LPL (lipoprotein lipase) genes. In addition, 188 normolipidemic Dutch control panels (NDCP) and 141 hypertriglyceridemic (HTG) patients were genotyped as well. No associations were found for four HL gene polymorphisms and two LPL gene polymorphisms and type III HLP. The frequency of the rare allele of APOC3 3238 G>C and APOA5 −1131 T>C (in linkage disequilibrium) was significantly higher in type III HLP patients when compared with normolipidemic E2/2 subjects, 15.6 vs 6.9% and 15.1 vs 5.8%, respectively, (P<0.05). Furthermore, the frequencies of the APOA5 c.56 G>C polymorphism and LPL c.27 G>A mutation were higher in type III HLP patients, though not significant. Some 58% of the type III HLP patients carried either the APOA5 −1131 T>C, c.56 G>C and/or LPL c.27 G>A mutation as compared to 27% of the normolipidemic APOE2/2 subjects (odds ratio 3.7, 95% confidence interval=1.8–7.5, P<0.0001). The HTG patients showed similar allele frequencies of the APOA5, APOC3 and LPL polymorphisms, whereas the NDCP showed similar allele frequencies as the normolipidemic APOE2/2. Patients with the APOC3 3238 G>C/APOA5 −1131 T>C polymorphism showed a more severe hyperlipidemia than patients without this polymorphism. Polymorphisms in lipolysis genes associate with the expression and severity of type III HLP in APOE2/2. 相似文献
59.
Ferguson JJ Fathy Waly HM Le D Thomakos N Wilson JM 《The Journal of invasive cardiology》1998,10(6):318-322
Considerable controversy exists as to the appropriate dosing of heparin for PTCA. We retrospectively reviewed records of 335 patients undergoing PTCA to determine: 1) the effects of correcting for weight and body surface area (BSA) on the heparin dose-response distribution; and 2) the average dose of heparin (standard, weight-based, and BSA-based) required to achieve an activated clotting time (ACT) of 300 seconds. For each patient, height, weight, BSA, baseline ACT (HemoTec), bolus heparin dose, and post-heparin ACT were recorded and the heparin response calculated. There were no significant differences in the distributions of standard (SD =.017 +/- 006 sec/U, 34% of mean), weight-based (SD = 1.41 +/- 0.46 sec/U/kg, 33% of mean), and BSA-based (SD = 0.033 +/- 0.011 sec/U/m2, 32% of mean) heparin response. There were slight, but significant correlations between heparin response and weight (r = 0.37) and heparin response and BSA (r = 0.36). The estimated doses of heparin to achieve a HemoTec ACT of 300 seconds were 10,650 +/- 1270 U, 130 +/- 15 U/kg, and 5390 +/- 640 U/m2. CONCLUSIONS: There are slight but significant correlations between heparin response and both weight and BSA. The distributions of weight- and BSA-corrected heparin response are similar to that of standard heparin dosing. Thus, weight adjusted heparin dosing would not appear to be likely to provide a more reliable ACT response to bolus doses of heparin. 相似文献
60.