全文获取类型
收费全文 | 2020篇 |
免费 | 200篇 |
国内免费 | 9篇 |
专业分类
耳鼻咽喉 | 10篇 |
儿科学 | 52篇 |
妇产科学 | 19篇 |
基础医学 | 306篇 |
口腔科学 | 35篇 |
临床医学 | 171篇 |
内科学 | 494篇 |
皮肤病学 | 37篇 |
神经病学 | 182篇 |
特种医学 | 81篇 |
外科学 | 323篇 |
综合类 | 28篇 |
一般理论 | 3篇 |
预防医学 | 179篇 |
眼科学 | 8篇 |
药学 | 78篇 |
肿瘤学 | 223篇 |
出版年
2021年 | 28篇 |
2019年 | 29篇 |
2018年 | 21篇 |
2017年 | 13篇 |
2016年 | 14篇 |
2015年 | 21篇 |
2014年 | 40篇 |
2013年 | 63篇 |
2012年 | 65篇 |
2011年 | 75篇 |
2010年 | 55篇 |
2009年 | 36篇 |
2008年 | 72篇 |
2007年 | 87篇 |
2006年 | 91篇 |
2005年 | 90篇 |
2004年 | 81篇 |
2003年 | 86篇 |
2002年 | 68篇 |
2001年 | 72篇 |
2000年 | 76篇 |
1999年 | 67篇 |
1998年 | 47篇 |
1997年 | 29篇 |
1996年 | 30篇 |
1995年 | 35篇 |
1994年 | 27篇 |
1993年 | 29篇 |
1992年 | 44篇 |
1991年 | 46篇 |
1990年 | 43篇 |
1989年 | 57篇 |
1988年 | 41篇 |
1987年 | 45篇 |
1986年 | 40篇 |
1985年 | 39篇 |
1984年 | 33篇 |
1983年 | 28篇 |
1980年 | 16篇 |
1979年 | 29篇 |
1978年 | 28篇 |
1977年 | 16篇 |
1976年 | 23篇 |
1975年 | 19篇 |
1974年 | 30篇 |
1973年 | 21篇 |
1972年 | 14篇 |
1971年 | 21篇 |
1970年 | 16篇 |
1966年 | 15篇 |
排序方式: 共有2229条查询结果,搜索用时 0 毫秒
1.
Debra L. Roter Richard M. Frankel Judith A. Hall David Sluyter 《Journal of general internal medicine》2006,21(1):28-34
Relationship-centered care reflects both knowing and feeling: the knowledge that physician and patient bring from their respective domains of expertise, and the physician’s and patient’s experience, expression, and perception of emotions during the medical encounter. These processes are conveyed and reciprocated in the care process through verbal and nonverbal communication. We suggest that the emotional context of care is especially related to nonverbal communication and that emotion-related communication skills, including sending and receiving nonverbal messages and emotional self-awareness, are critical elements of high-quality care. Although nonverbal behavior has received far less study than other care processes, the current review argues that it holds significance for the therapeutic relationship and influences important outcomes including satisfaction, adherence, and clinical outcomes of care. 相似文献
2.
Cerebrovascular and metabolic perturbations in delayed heavy charged particle radiation injury 总被引:5,自引:0,他引:5
E H Lo K A Frankel R L Delapaz A Poljak K H Woodruff K M Brennan M H Phillips P E Valk G K Steinberg J I Fabrikant 《Brain research》1989,504(1):168-172
Focal heavy charged particle irradiation of the rabbit brain created defined lesions which were observable by nuclear magnetic resonance (NMR) and positron emission tomography (PET) imaging techniques. The lesions appeared approximately 9-11 months after left partial hemibrain irradiation with 30 Gy (230 MeV/u helium ions), and were restricted to the white matter tracts and deep perithalamic and thalamic regions. 82Rubidium PET and Gadolinium DTPA enhanced NMR imaging were used to detect blood-brain barrier perturbations. 18Fluordeoxyglucose PET studies demonstrated widespread decreases in cerebral glucose uptake in the cortex and thalamus of the irradiated hemisphere. NMR and PET imaging results correlated well with histological findings. Rabbits irradiated with 15 Gy did not demonstrate any abnormalities in the brain with sequential NMR scans through 14 months post-irradiation. 相似文献
3.
4.
Rats were fed for 5 wk 10% (wt/wt) menhaden oil (MO) or a 10% corn oil-lard (COL) mixture (1:1) in diets with a low vitamin E content (less than or equal to 5 mg/kg) or supplemented with d-alpha-tocopheryl succinate to a total of 30 or 150 mg per kg. Thiobarbituric acid-reactive substances (TBARS), conjugated dienes (CD), hexanal and total volatiles (TOV) were measured in tissue homogenates incubated at 37 degrees C for 1 h in the absence (uninduced) and presence of 15 microM ferrous sulfate (induced). The fatty acid composition of liver and kidney reflected that of dietary lipids. For uninduced peroxidation, there was in general a significant inverse correlation of TBARS, CD and TOV with the log of dietary vitamin E content for liver and kidney from rats fed either lipid. For induced peroxidation, the inverse correlation was significant for liver, but not for kidney, from rats fed either lipid. The correlation was generally higher for liver and kidney from rats fed COL than for tissues from rats fed MO. Vitamin E was thus a more effective antioxidant for liver than for kidney regardless of the dietary lipid, and for liver and kidney from rats fed COL than from rats fed MO. Dietary MO enhanced tissue susceptibility to both peroxidation systems. A simulation model developed to mimic the experiments showed good correlations between experimental data and simulated values. 相似文献
5.
6.
The stability of the basic unit for fixation of the Ilizarov external fixation system was tested in several loading modes. The effects of varying the number of wires and the orientation of wire placement were studied. The fixation units were mounted on a plastic, simulated, long bone and tested by loading in several directions. The Ilizarov fixation ring was found to be relatively stiff in axial compression and torsion. Its stiffness in this mode was directly proportional to the number of wires in the system and independent of the configuration of wire placement. Loading in bending and in shear provided much lower levels of stiffness, and this was dependent on the angles formed between the wires. The addition of a wire at a minimum distance of 4 cm from the primary ring significantly improved bending stiffness. The use of opposed olive wires also improved shear stiffness. 相似文献
7.
B G Frankel 《Canadian Medical Association journal》1988,138(5):419-423
The costs of smoking are extensive, not only in fiscal terms but also in terms of human suffering. A review of several major public policies reveals that concerted efforts by all levels of government and by the public can have an effect on the rate of consumption of tobacco. Specifically, increases in price through taxation, anti-smoking messages, restrictions on smoking behaviour and increased public pressure are effective in reducing smoking. Serious joint efforts in the area of public policy should be pursued to control the effects of this hazardous practice in Canada. 相似文献
8.
9.
Background Many centers use local anesthesia for adult inguinal hernia surgery in the setting of day-case surgery. There are no reports
on, or guidelines for, use of anesthesia for inguinal hernia surgery in adolescents. We describe our initial experience with
the use of local anesthesia and intravenous sedation for inguinal hernia surgery in adolescents in the setting of a day-surgery
facility.
Methods The charts of 14 consecutive adolescent patients (aged 12–17) who had inguinal hernia surgery from July 2004 to March 2005
were reviewed retrospectively. Intravenous sedation was administered 1–3 min before injection of local anesthetic. Sedation
consisted of midazolam 0.085 mg kg−1 and either fentanyl 0.85 μg kg−1 or ketamine 0.085 mg kg−1, according to the preference of the anesthesiologist. Additional sedation with half the initial dose was administered if
required. Local anesthesia using a combination of lignocaine and bupivacaine was administered by the surgeon with infiltration
in the skin and deep tissues.
Results Fourteen adolescents aged 12–17 years (mean 14.8 ± 1.37), weighing 34–100 kg (mean 61.2 ± 16.5), had 15 inguinal hernia repairs
with sedation and local anesthesia. All the patients were male. All completed the surgery with sedation and local anesthesia.
None required conversion to general anesthesia. There were no immediate or subsequent complications. Mean time from the end
of surgery to discharge home was under 2 h (mean 106 ± 36 min). Examination of patient charts did not reveal any complaints
regarding the surgery or the postoperative course at the postoperative follow up visit.
Conclusions The use of local anesthesia with intravenous sedation for inguinal hernia repair in the adolescent age group seems feasible
and requires further prospective study. 相似文献
10.