全文获取类型
收费全文 | 4647篇 |
免费 | 292篇 |
国内免费 | 22篇 |
专业分类
耳鼻咽喉 | 108篇 |
儿科学 | 284篇 |
妇产科学 | 49篇 |
基础医学 | 466篇 |
口腔科学 | 138篇 |
临床医学 | 346篇 |
内科学 | 939篇 |
皮肤病学 | 112篇 |
神经病学 | 415篇 |
特种医学 | 178篇 |
外科学 | 765篇 |
综合类 | 98篇 |
一般理论 | 2篇 |
预防医学 | 192篇 |
眼科学 | 180篇 |
药学 | 285篇 |
中国医学 | 17篇 |
肿瘤学 | 387篇 |
出版年
2023年 | 31篇 |
2022年 | 83篇 |
2021年 | 245篇 |
2020年 | 121篇 |
2019年 | 162篇 |
2018年 | 196篇 |
2017年 | 140篇 |
2016年 | 190篇 |
2015年 | 147篇 |
2014年 | 249篇 |
2013年 | 258篇 |
2012年 | 428篇 |
2011年 | 357篇 |
2010年 | 209篇 |
2009年 | 157篇 |
2008年 | 245篇 |
2007年 | 275篇 |
2006年 | 237篇 |
2005年 | 177篇 |
2004年 | 170篇 |
2003年 | 122篇 |
2002年 | 106篇 |
2001年 | 49篇 |
2000年 | 62篇 |
1999年 | 57篇 |
1998年 | 34篇 |
1997年 | 32篇 |
1996年 | 26篇 |
1995年 | 14篇 |
1994年 | 10篇 |
1992年 | 24篇 |
1991年 | 26篇 |
1990年 | 32篇 |
1989年 | 19篇 |
1988年 | 17篇 |
1987年 | 24篇 |
1986年 | 20篇 |
1985年 | 16篇 |
1984年 | 20篇 |
1983年 | 13篇 |
1982年 | 9篇 |
1978年 | 11篇 |
1977年 | 10篇 |
1976年 | 10篇 |
1975年 | 16篇 |
1974年 | 11篇 |
1973年 | 9篇 |
1972年 | 10篇 |
1971年 | 11篇 |
1970年 | 8篇 |
排序方式: 共有4961条查询结果,搜索用时 15 毫秒
1.
2.
Katherine Berry Richard Drake Catherine Stewart Lisa Marie Aitkin Jane Byrne Christine Barrowclough Nitin Purandare 《The American journal of geriatric psychiatry》2007,15(9):800-806
OBJECTIVE: To investigate whether orofacial tardive dyskinesia (OTD) is associated with frontal lobe dysfunction and whether either are related to the coping abilities independent of psychiatric symptoms in older people with psychotic disorders. METHODS: A total of 52 patients, aged over 65 years or over, who satisfied International Classification of Diseases, Tenth Revision criteria for psychotic disorders (F20-F29) were recruited into the study. OTD was measured using the Abnormal Involuntary Movements Scale and Waddington et al.'s (1993) criteria. Neuropsychological measures were specifically selected to assess different aspects of frontal function and coping was measured using a semistructured interview. Psychiatric symptoms were assessed using the Positive and Negative Syndrome Scale (PANSS). RESULTS: Patients with OTD showed more severe global cognitive impairment compared to patients without OTD. Group differences on measures of frontal lobe dysfunction were not maintained following adjustment for global cognitive impairment. Patients with OTD did not differ from patients without OTD on coping measures. Scores on the general psychopathology subscale of the PANSS, which includes symptoms associated with depression and anxiety, consistently predicted patients' negative perceptions of stressors and appraisals of coping, but cognitive impairment did not predict coping independent of symptoms. CONCLUSION: The association between coping and general psychopathology in older patients with psychosis warrants further investigation as both variables may be amenable to psychological interventions. 相似文献
3.
Samir Kumar Praharaj mbbs md dpm Nishant Goyal mbbs md dpm Sukanto Sarkar mbbs md dpm Dhruv Bagati mbbs Prakriti Sinha mp hil Vinod Kumar Sinha mbbs md dpm 《Psychiatry and clinical neurosciences》2009,63(2):230-234
Reported herein is a case of obsessive–compulsive disorder with persistent and distressing musical obsessions along with other symptoms. Advanced source analysis of electroencephalographic data indicated high spectral power over the bifrontal region. The musical symptoms were resistant to pharmacotherapy but there was some reduction in frequency and duration of musical obsessions with thought-stopping technique. 相似文献
4.
Nand L. Sharma Vikram K. Mahajan Neelam Gupta Nitin Ranjan and Anju Lath 《Journal of cutaneous pathology》2009,36(4):486-492
Ehlers-Danlos syndrome – vascular type, the only lethal form, is rarely reported in dermatology literature. It is characterized by translucent, atrophic skin, easy bruising, arterial, intestinal and/or uterine fragility manifesting as varicose veins, aneurysms and vascular/visceral/uterine rupture. As its dermatopathologic features are not well elucidated, diagnosis is often made after a catastrophic complication or at autopsy. This 36 year-old non-consanguineous male had brown-black plaques with atrophy and frequent ulceration over legs and dorsal feet and tortuous varicose veins around ankles for the past 15 years. Perivenous skin was translucent and hypopigmented. He had multiple and ecchymotic keloids and small atrophic, pityriasis versicolor-like lesions over trunk. He did not have hypermobile/hyperextensible skin and joints and showed no systemic or investigative abnormality. Histopathologic features of atrophic lesion included blood extravasation in atrophic epidermis/dermis, focal clustering and dilatation of blood vessels, malformed vessel walls, abundant hemosiderin in the dermis and homogenously stained/whorled patterned collagen especially around blood vessels. Pathology of keloidal lesion showed new collagen and vascular fragility. These histopathologic features appear of diagnostic value especially in patients who have compatible clinical findings but cannot afford confirmation by biochemical testing for abnormal synthesis of type III procollagen or identification of mutations in the COL3A1 gene. 相似文献
5.
6.
V Bhattacharya G R Reddy Sunish Goyal Umesh Kumar 《Journal of plastic, reconstructive & aesthetic surgery》2007,60(8):892-897
Defects involving the distal leg and foot are frequently encountered following various aetiological factors. Paucity of local tissue causes surgeons to resort to the retrograde peninsular flap, the cross leg flap or the free flap. With specific knowledge of perforators, the fasciocutaneous flap from the calf area can be transferred to the defect in a single stage based on skeletonised distal perforators. The surgical anatomy, flap planning and procedure have been detailed. Nineteen patients were treated during the period 1995 to 2005. The perforators were identified preoperatively by audio Doppler. The flaps were marked and dissected proximal to the defect skeletonising the distal perforators under loupe magnification and transferred to the defect in a single stage. The donor site was skin grafted. Out of 19 cases, 16 flaps healed uneventfully, one flap necrosed completely and in two cases there was marginal necrosis. The cases were followed up for 2-10 years with an average of 6 years. With detailed knowledge of perforators one can safely reconstruct distal moderate-size defects of the lower limb in a single stage, thus having the benefits of free tissue transfer without resorting to microsurgery. This technique has proved to be an advancement in the reconstructive repertoire allowing flaps of non conventional dimensions to be perfused by skeletonised perforators. 相似文献
7.
Nitin Gupta Saurabh Varshney S. S. Bist Pratima Gupta Rajat Bhatia 《Indian journal of otolaryngology and head and neck surgery》2007,59(4):309-312
Retropharyngeal abscesses were fairly common in preantibiotic era but the advent of antibiotics has reduced the overall incidence
of these abscesses. They still continue to occur specially in developing world and carry significant morbidity and even mortality
if not managed properly. The prevalence of this abscess in the young children pose a bigger challenge, as the examination
of oral cavity is difficult. Emphasis is placed on the age, sex, type, and duration of symptoms, bacteriology, methodology
of diagnosis, therapy and complications. With proper antibiotic cover and surgical management, majority of patients today
survive without major residual squeal. Hereby we present a series of 15 cases of retropharyngeal abscess. 相似文献
8.
9.
A case of congenital erythropoietic porphyria, with corneoscleral ulceration, a rare association in this disorder, was reported. Anterior segment ischemia is believed to play an important role in the etiopathogenesis of corneoscleral ulceration. Remarkable improvement occurred with use of topical heparin drops (500 units/ml). 相似文献
10.