全文获取类型
收费全文 | 1067篇 |
免费 | 98篇 |
国内免费 | 46篇 |
专业分类
耳鼻咽喉 | 6篇 |
儿科学 | 74篇 |
妇产科学 | 31篇 |
基础医学 | 99篇 |
口腔科学 | 37篇 |
临床医学 | 171篇 |
内科学 | 213篇 |
皮肤病学 | 41篇 |
神经病学 | 55篇 |
特种医学 | 156篇 |
外科学 | 100篇 |
综合类 | 25篇 |
预防医学 | 67篇 |
眼科学 | 12篇 |
药学 | 59篇 |
1篇 | |
中国医学 | 9篇 |
肿瘤学 | 55篇 |
出版年
2023年 | 4篇 |
2022年 | 3篇 |
2021年 | 11篇 |
2020年 | 10篇 |
2019年 | 13篇 |
2018年 | 30篇 |
2017年 | 26篇 |
2016年 | 27篇 |
2015年 | 29篇 |
2014年 | 41篇 |
2013年 | 45篇 |
2012年 | 18篇 |
2011年 | 28篇 |
2010年 | 42篇 |
2009年 | 71篇 |
2008年 | 30篇 |
2007年 | 49篇 |
2006年 | 20篇 |
2005年 | 27篇 |
2004年 | 14篇 |
2003年 | 17篇 |
2002年 | 11篇 |
2001年 | 24篇 |
2000年 | 14篇 |
1999年 | 23篇 |
1998年 | 72篇 |
1997年 | 82篇 |
1996年 | 57篇 |
1995年 | 51篇 |
1994年 | 37篇 |
1993年 | 43篇 |
1992年 | 16篇 |
1991年 | 9篇 |
1990年 | 12篇 |
1989年 | 26篇 |
1988年 | 23篇 |
1987年 | 29篇 |
1986年 | 16篇 |
1985年 | 22篇 |
1984年 | 12篇 |
1983年 | 12篇 |
1982年 | 10篇 |
1981年 | 8篇 |
1980年 | 13篇 |
1979年 | 2篇 |
1978年 | 5篇 |
1977年 | 11篇 |
1976年 | 5篇 |
1975年 | 2篇 |
1930年 | 1篇 |
排序方式: 共有1211条查询结果,搜索用时 31 毫秒
101.
Acupuncture reflexotherapy in the treatment of sensory urgency that persists after transurethral resection of the prostate: a preliminary report 总被引:1,自引:0,他引:1
AIMS: In this study, we wanted to evaluate whether acupuncture reflexotherapy is able to treat the sensory irritative components of LUTS (lower urinary tract symptoms) that persist after transurethral resection of the prostate. METHODS: We have evaluated 42 patients, randomly selected into three groups: 14 patients received placebo, 15 patients received oxybutynin, and 13 patient were treated with electrostimulation by acupuncture reflexotherapy. RESULTS: Before treatment, the mean maximum flow rate (Qmax) was 21.0 +/- 3.2 mL/sec, the mean International Prostate Symptom Score (I-PSS) score was 12.9 +/- 4.2, the mean I-PSS Quality of Life (IPSS QoL) score was 3.6 +/- 1.2. At the first check-up performed after 3 months, we could observe that the I-PSS and QoL scores were 12.6 +/- 4.3 and 3.8 +/- 1.3 in the group who received placebo; the scores decreased to 11.1 +/- 3.2 and to 3.1 +/- 1.0, respectively, in the 15 patients treated with oxybutynin and decreased to 6.1 +/- 2.6 and 1.3 +/- 1.1, respectively, in the 13 patients who underwent acupuncture reflexotherapy. At 1-year follow-up, these parameters were practically similar. The voiding diaries allowed us to deduce that the average number of daytime voidings decreased by 8% in patients who received oxybutynin and decreased by 20% in 13 patients who underwent reflexotherapy; the average number of nocturnal micturitions decreased by approximately 20% and 60%, respectively, in patients who received oxybutynin and reflexotherapy. CONCLUSIONS: This study has pointed out that acupuncture reflexotherapy has a real benefit in patients with sensory urgency that persists after transurethral resection of the prostate. 相似文献
102.
103.
Developing information literacy: a key to evidence-based nursing 总被引:9,自引:0,他引:9
A. Shorten RN CM BN MSc . C. Wallace RN BA GradDipEd Med P. A. Crookes RN RNT BSc PhD 《International nursing review》2001,48(2):86-92
This report describes the evaluation of a curriculum-integrated programme designed to help students develop an awareness of the nursing literature, the skills to locate and retrieve it, and skills required in its evaluation; in other words'information literacy'. Positive changes in student performance on objective measures of information-literacy skills were revealed as well as a significant increase in the levels of confidence of the student in performing those skills. Students who had undertaken the information-literacy programme ('programme' students) performed better on a range of objective measures of information literacy, as well as reporting higher levels of confidence in these skills, than students who had not participated in the programme ('non-programme' students). Evaluation of this programme provides evidence of the potential usefulness of a curriculum-integrated approach for the development of information-literacy skills within nursing education. With these underlying skills, students will be better equipped to consolidate and extend their key information-literacy skills to include research appreciation and application. These are vital for effective lifelong learning and a prerequisite to evidence-based practice. 相似文献
104.
Purpose.?To explore disability in women with fibromyalgia with a focus on their work situation.Method.?Review of literature on work status of women with fibromyalgia.Results.?Major differences exist between studies in reported disability and in the percentages of women working. Limitations caused by pain, fatigue, decreased muscle strength, and endurance influence work capacity. However, 34?–?77% of the women work. Individual adjustments in the work situation are reported. When the women find a level that matches their ability, they continue to work and find satisfaction in their work role. Many factors besides degree of impairment or disability influence whether clients with longstanding pain can remain in their work role or return to work after sickness leave.Conclusion.?The total life situation, other commitments, type of work tasks, the ability to influence the work situation, and the physical and psychosocial work environment are important factors in determining whether a person can remain in a work role. More knowledge is needed about how to adjust work conditions for people with partial work ability to the benefit of society and the individual. 相似文献
105.
106.
Pineal germinoma: MR imaging 总被引:6,自引:0,他引:6
Magnetic resonance (MR) imaging characteristics of pineal germinomas are described in seven patients imaged with MR and computed tomography (CT). In patients with symptoms of an enlarging process in the quadrigeminal plate cistern, MR imaging was as sensitive as CT scanning in detecting the mass. MR imaging did not detect a normal-sized, calcified neoplastic gland. Germinoma, germinoma with embryonal cell carcinoma elements, and pineoblastoma demonstrated different MR signal characteristics. Although direct coronal and sagittal MR images were useful in defining the relationship of the tumor to the posterior third ventricle, Sylvian aqueduct, and vein of Galen, the ease, rapidity, and sensitivity of CT scanning suggest that CT should remain the modality of choice for initial evaluation and screening of the pineal region, especially in the younger pediatric population, in whom detection of calcification may provide the only clue of an abnormality. 相似文献
107.
Detection and quantification of chronic cerebrovascular disease: comparison of MR imaging, SPECT, and CT 总被引:1,自引:0,他引:1
Seiderer M; Krappel W; Moser E; Hahn D; Schmiedek P; Buell U; Kirsch CM; Lissner J 《Radiology》1989,170(2):545-548
Twenty patients with angiographically proved occlusion of the internal carotid artery (ICA) (19 unilateral, one bilateral) were studied with magnetic resonance (MR) imaging, iodine-123 iodoamphetamine (IMP) single photon emission computed tomography (SPECT), xenon-133 SPECT, and computed tomography (CT). All patients had a history of stroke or prolonged reversible ischemic neurologic deficit for more than 4 weeks. By regions of interest, T1, T2, regional cerebral blood flow (rCBF), and the number and size of the lesions were determined. The data were expressed as interhemispheric ratios (diseased/nondiseased). The highest ratios obtained were for MR imaging (T1, 2.60 +/- 0.42; T2, 1.61 +/- 0.22 [mean +/- standard deviation]) followed by Xe-133 SPECT (0.58 +/- 0.13) and IMP SPECT (0.56 +/- 0.13). Correlation coefficients for MR imaging (1/T1, 1/T2) and IMP SPECT were below .21. The lesion size was greatest on IMP SPECT images, intermediate on MR images, and least on CT scans. However, MR imaging was superior in detection of pathologic areas (detection rates: MR, 100%; IMP SPECT, 91%; CT, 79%). Relaxation times do not correlate with rCBF. 相似文献
108.
109.
Venous clots: evaluation with MR imaging 总被引:2,自引:0,他引:2
In vitro and in vivo studies were performed to determine the proton relaxation and imaging characteristics of static blood and acute and organized clot in canine jugular veins. In vivo, it was found that two inversion recovery sequences using a short inversion time (100 msec) demonstrated better differentiation of signal intensity of intravascular clot from surrounding soft tissues than did standard T1- and T2-weighted sequences. In vitro, quantitative measurements showed marked reduction of both T1 and T2 relaxation time of acute clot compared with stagnant blood. In addition, the T1 relaxation time, and to a lesser extent the T2 relaxation time, shortened as the clot aged, indicating a potential role for magnetic resonance imaging in determining the age of venous thrombi. 相似文献
110.
Williamson MR; Boyd CM; McGuire EL; Angtuaco T; Westbrook KC; Lang NP; Alston J; Broadwater JR; Navab F; Bersey ML 《Radiology》1986,159(1):272-273
The nuclear medicine bleeding scan is frequently insufficient to locate sites of bleeding precisely, in spite of its great sensitivity. A small, hand-held Geiger-Müller counter, placed directly on exposed intestine in the operating room, enables precise location of the probable bleeding site. In three patients, the technique allowed a minimal amount of intestine to be resected, distinguished between large- and small-intestinal hemorrhage, and eliminated other foci as sites of bleeding. 相似文献