全文获取类型
收费全文 | 2163篇 |
免费 | 133篇 |
国内免费 | 5篇 |
专业分类
耳鼻咽喉 | 7篇 |
儿科学 | 37篇 |
妇产科学 | 87篇 |
基础医学 | 342篇 |
口腔科学 | 35篇 |
临床医学 | 128篇 |
内科学 | 316篇 |
皮肤病学 | 5篇 |
神经病学 | 313篇 |
特种医学 | 73篇 |
外科学 | 496篇 |
综合类 | 9篇 |
预防医学 | 76篇 |
眼科学 | 124篇 |
药学 | 66篇 |
中国医学 | 1篇 |
肿瘤学 | 186篇 |
出版年
2023年 | 9篇 |
2022年 | 10篇 |
2021年 | 54篇 |
2020年 | 11篇 |
2019年 | 40篇 |
2018年 | 43篇 |
2017年 | 32篇 |
2016年 | 43篇 |
2015年 | 48篇 |
2014年 | 83篇 |
2013年 | 92篇 |
2012年 | 121篇 |
2011年 | 130篇 |
2010年 | 87篇 |
2009年 | 71篇 |
2008年 | 126篇 |
2007年 | 119篇 |
2006年 | 118篇 |
2005年 | 100篇 |
2004年 | 98篇 |
2003年 | 99篇 |
2002年 | 88篇 |
2001年 | 27篇 |
2000年 | 41篇 |
1999年 | 31篇 |
1998年 | 21篇 |
1997年 | 11篇 |
1996年 | 9篇 |
1995年 | 11篇 |
1994年 | 12篇 |
1993年 | 12篇 |
1992年 | 30篇 |
1991年 | 31篇 |
1990年 | 32篇 |
1989年 | 29篇 |
1988年 | 28篇 |
1987年 | 46篇 |
1986年 | 37篇 |
1985年 | 41篇 |
1984年 | 27篇 |
1983年 | 22篇 |
1982年 | 17篇 |
1981年 | 12篇 |
1980年 | 21篇 |
1979年 | 13篇 |
1978年 | 18篇 |
1977年 | 12篇 |
1976年 | 9篇 |
1975年 | 13篇 |
1974年 | 11篇 |
排序方式: 共有2301条查询结果,搜索用时 15 毫秒
1.
Y. Graif A. Goldberg R. Tamir D. Vigiser S. Melamed 《Clinical and experimental allergy》2006,36(12):1532-1537
BACKGROUND: In allergic conditions, the degree of skin test reactivity does not always correlate with the severity of clinical symptoms. Additional factors may contribute to the reported symptom severity. OBJECTIVES: To investigate the association between the magnitude of the skin prick test (SPT) response and the reported symptom severity in patients with allergic rhinitis and the possible modifying role of psychological factors. METHODS: One hundred four patients with allergic rhinitis and 23 with non-allergic rhinitis, classified according to their SPT response to 19 aeroallergens, were asked to rate the severity of five symptoms and to indicate whether their symptoms intensified on exposure to five common aeroallergens. They also completed a psychological questionnaire. Results Reported symptom severity of allergic rhinitis did not correlate with weal size for any of the aeroallergens tested or with the number of positive responses on SPT. It was not related to patient age, sex, or education. The reported symptoms severity correlated positively (0.29, P < 0.01) with reported symptom intensification on exposure to allergens. Moreover, both outcomes were positively associated with the psychological factors of hypochondriasis (0.20, P < 0.05 and 0.18, P < 0.05, respectively), and somatic awareness (0.24, P < 0.05 and 0.33, P < 0.01, respectively), but not with neuroticism. CONCLUSIONS: The severity of symptoms experienced by patients with allergic rhinitis is apparently not related to the magnitude of SPT response, but rather to psychological factors of hypochondriasis and somatic awareness. Physicians should be aware of the contribution of psychological factors to patient perceptions of the intensity of symptoms and of the intensification of symptoms on their exposure to allergens. 相似文献
2.
3.
Sobel Somani Leslie D Mackeen Yair Morad J Raymond Buncic Derek C Armstrong John H Phillips Alex V Levin 《Journal of AAPOS》2003,7(1):54-59
PURPOSE: To determine whether 3-dimensional ultrasonography (3D US) provides information about anatomy and position of extraocular muscles to better guide surgeons approaching strabismus in patients with craniosynostosis who often have anomalous or absent eye muscles. METHODS: The 4 rectus eye muscles were imaged using 3D US for 7 children with craniosynostosis before or after strabismus surgery. Reconstructed 3D images were interpreted as having normal or abnormal anatomy and position, based on comparison with images acquired from 6 normal eyes. Interpretation was validated against the intraoperative findings from strabismus surgery. RESULTS: A total of 34 scans from the study group were used for comparison and validation purposes. Accuracy of anatomical assessments was 85% +/- 12% (percentage +/- confidence interval) and of positional assessments was 62% +/- 16%. Sensitivity and specificity of anatomical assessments was 80% +/- 14% and 88% +/- 10%, respectively. Anatomic anomalies detected by 3D US included excessively thick, thin, scarred and fibrotic, and absent muscles. Sensitivity and specificity of positional assessments was 48% +/- 17% and 85% +/- 12%, respectively. Positional anomalies such as muscle displacement off the normal clock hour axis or posteriorly displaced insertion were also detected. CONCLUSIONS: The 3D US may have an adjunctive role in determining anatomy and position of rectus muscles in patients with craniosynostosis, although it was more accurate in assessing anatomic features rather than positional features of rectus muscles. 相似文献
4.
5.
6.
A patient with refractory glaucoma 1 year after cataract extraction and trabeculectomy had Molteno implant surgery. Three days after surgery a kissing choroidal effusion and retinal detachment adherent to the posterior chamber IOL were detected. Repeated choroidal taps were unsuccessful. Removal of the Molteno implant, vitrectomy, and silicone oil injection were required to reattach the retina. 相似文献
7.
8.
David Shitrit Lev Nirit Sheely I Shiran Gabriel Izbicki Dov Sofer Melamed Eldad Mordechai R Kramer 《The Journal of heart and lung transplantation》2003,22(8):946-950
Progressive multifocal leukoencephalopathy (PML) is a sub-acute, demyelinating disease of the brain caused by a human polyomavirus. We describe a patient with the onset of PML 7 months after lung transplantation. The patient was treated with immunosuppressive modulation and cidofovir, a new anti-viral therapy for PML, with stabilization of the symptoms. We also review the 4 additional reports in the literature of PML after heart and lung transplantation. Progressive multifocal leukoencephalopathy may become more prevalent as the population of heart and lung transplantation recipients increases. 相似文献
9.
10.
D N Ader A R Seibring P Bhaskar B G Melamed 《Journal of oral and maxillofacial surgery》1992,50(1):27-31; discussion 31-2
Patient response to interactive videodisc preparation for third molar extraction surgery was examined as a function of self-reported information-seeking style. Amount learned was compared among patients informed via an interactive videodisc, noninteractive videotape of the same material, or surgeon only. Anxiety levels and satisfaction with preparation were compared between the videodisc and videotape groups. At consultation, patients (n = 35) were randomly assigned to either the disc- or the tape-viewing group. First, subjects completed a demographic survey, state anxiety scale, quiz on knowledge about third molars and surgery risks and complications, and information-seeking scales. Immediately after viewing the video, subjects completed another anxiety scale and a multiple-choice quiz covering the material presented. Subsequently, another 25 patients undergoing the routine (surgeon-only) consultation procedure were given the same multiple-choice quiz following consultation. Quiz scores differed significantly among the groups; mean percent correct for the tape-viewing subjects was 85; for disc-viewing subjects 72.6; for surgeon-only subjects, 40. Self-rated information seeking was unrelated to amount of video viewed by disc subjects (on average, 64% of the videodisc was viewed), and disc subjects who rated themselves higher in information-seeking achieved the lowest postpreparation quiz scores. Subjects in the disc group were significantly more satisfied with the amount of preparation than the tape group. Although disc group subjects were significantly less knowledgeable following consultation than were tape group subjects, interactive videodisc preparation for third molar extraction appears to have some advantages over more traditional approaches. Further research is needed to determine whether this approach to preparing patients is suitable for widespread clinical use. 相似文献