全文获取类型
收费全文 | 14043篇 |
免费 | 1145篇 |
国内免费 | 36篇 |
专业分类
耳鼻咽喉 | 99篇 |
儿科学 | 493篇 |
妇产科学 | 303篇 |
基础医学 | 2017篇 |
口腔科学 | 101篇 |
临床医学 | 1891篇 |
内科学 | 2883篇 |
皮肤病学 | 224篇 |
神经病学 | 1406篇 |
特种医学 | 312篇 |
外科学 | 1392篇 |
综合类 | 147篇 |
一般理论 | 20篇 |
预防医学 | 1739篇 |
眼科学 | 165篇 |
药学 | 973篇 |
中国医学 | 16篇 |
肿瘤学 | 1043篇 |
出版年
2024年 | 28篇 |
2023年 | 236篇 |
2022年 | 290篇 |
2021年 | 576篇 |
2020年 | 374篇 |
2019年 | 628篇 |
2018年 | 618篇 |
2017年 | 414篇 |
2016年 | 457篇 |
2015年 | 453篇 |
2014年 | 563篇 |
2013年 | 818篇 |
2012年 | 1223篇 |
2011年 | 1211篇 |
2010年 | 590篇 |
2009年 | 538篇 |
2008年 | 836篇 |
2007年 | 873篇 |
2006年 | 857篇 |
2005年 | 779篇 |
2004年 | 642篇 |
2003年 | 617篇 |
2002年 | 577篇 |
2001年 | 77篇 |
2000年 | 60篇 |
1999年 | 79篇 |
1998年 | 98篇 |
1997年 | 103篇 |
1996年 | 70篇 |
1995年 | 69篇 |
1994年 | 40篇 |
1993年 | 50篇 |
1992年 | 36篇 |
1991年 | 28篇 |
1990年 | 25篇 |
1989年 | 18篇 |
1988年 | 16篇 |
1987年 | 20篇 |
1986年 | 11篇 |
1985年 | 8篇 |
1984年 | 19篇 |
1983年 | 21篇 |
1982年 | 20篇 |
1981年 | 29篇 |
1980年 | 14篇 |
1979年 | 9篇 |
1978年 | 13篇 |
1977年 | 28篇 |
1976年 | 17篇 |
1974年 | 7篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
21.
A rural hospital elective in a diploma nursing program is described. A need and opportunity for this unique practicum was identified in a Canadian province where one-third of the acute care beds are in hospitals of under 100 beds, located primarily in towns outside of metropolitan areas. The six week course offers students 35 hours of classroom content focusing on rural health care concepts plus a 150 hour practicum in one of three participating hospitals. The course is seen as unique in that it focuses on rural health care and is offered within the context of a diploma nursing program. Vive student outcomes are identified: awareness of the differences between rural and urban health care; integration of knowledge and experience from previous nursing courses as it relates to the rural context; increasing understanding of how rural population groups affect health care delivery; awareness of rural employment opportunities; and, preparation for the graduate role. A shared vision and collaborative effort on the part of the School of Nursing, the rural hospitals and the host communities has been necessary to establish and maintain such a course. 相似文献
22.
John K. Brooks Claire O. Leonard Peter J. Coccaro 《American journal of medical genetics. Part A》1992,43(3):595-601
We studied a new case of the G (Opitz BBB/G) syndrome in a 12-year-old boy. Several relatives had partial manifestations of the disorder. A comprehensive dental evaluation of the propositus was conducted; included is, to our knowledge, the first published cephalometric analysis of a G syndrome patient. We reviewed 139 cases of the G syndrome; 48 of them had at least one oral abnormality. These included clefting, micrognathia, ankyloglossia, and high-arched palate. Male G syndrome patients are more likely to have oral anomalies than affected females. © 1992 Wiley-Liss, Inc. 相似文献
23.
Margaret A Chen Timothy R Lander Claire Murphy 《Otolaryngology--head and neck surgery》2006,134(5):741-745
OBJECTIVE: To investigate peripheral nasal pathology as a contributor to olfactory impairment in DS. STUDY DESIGN: Twenty DS and 16 non-DS subjects were recruited. Nasal history and symptoms were assessed by self-report or informant. Olfactory threshold, odor identification, and nasal endoscopy were assessed on each subject. RESULTS: DS subjects were impaired on olfactory threshold (P<0.0001) and odor identification (P<0.001). Although DS subjects tended toward upper-respiratory infections, sleep-disordered breathing, and nasal itching, differences were not significant (P=0.07, 0.06, and 0.058, respectively). There were no significant differences on self-reported nasal history or symptoms. Endoscopy showed equivalent health in DS and control subjects. CONCLUSION: This DS population shows olfactory impairment. However, nasal health is comparable in DS subjects and controls. Nasal dysfunction is unlikely to contribute to olfactory impairment in DS. SIGNIFICANCE: Olfactory deficits in DS appear to be secondary to central, rather than rhinologic, pathology. EBM rating: B-2b. 相似文献
24.
25.
Cardiac MIBG scintigraphy is a sensitive tool for detecting cardiac sympathetic denervation in Parkinson's disease. 总被引:5,自引:0,他引:5
Frédéric Courbon Christine Brefel-Courbon Claire Thalamas Marie-Jeanne Alibelli Isabelle Berry Jean-Louis Montastruc Olivier Rascol Jean-Michel Senard 《Movement disorders》2003,18(8):890-897
[(123)I]Metaiodobenzylguanidine ([(123)I]MIBG) cardiac scintigraphy could be helpful to differentiate Parkinson's disease (PD) from multiple system atrophy (MSA), demonstrating that, in PD with autonomic failure but not in MSA, there is a myocardial postganglionic sympathetic dysfunction. To investigate whether this method is more sensitive than standard autonomic testing to detect early involvement of sympathetic cardiac efferent, we analyse MIBG myocardial uptake in 8 PD patients with normal autonomic testing (nondysautonomia PD group, NDPD) in comparison with 10 PD patients with abnormal autonomic testing (dysautonomia PD group, DPD) and 10 MSA patients. Global MIBG uptake was assessed using the ratio of [(123)I]MIBG uptake in the heart to the upper mediastinum (H/M) on planar scintigraphic data. Regional MIBG uptake was determined on two single photon emission tomography scans in regions of the left ventricle. The mean H/M ratios were significantly different among the three groups (P < 0.0001). H/M ratios of both NDPD and DPD patients groups (H/M = 1.83 +/- 0.50 and 1.24 +/- 0.40, respectively) were significantly lower than in MSA patients (H/M = 2.52 +/- 0.60). However, in NDPD patients, H/M was significantly higher than in DPD patients. When compared to MSA patients, NDPD patients showed a regional reduction in MIBG uptake in all left ventricle regions markedly in the apex and the inferior wall. Our results suggest that MIBG myocardial scintigraphy (analysis of both H/M ratio and regional MIBG uptake) may be more sensitive than standard autonomic testing for the early detection of silent autonomic dysfunction in PD. 相似文献
26.
Martina Ruzickova Claire Slaney Julie Garnham Martin Alda 《Revue canadienne de psychiatrie》2003,48(7):458-461
OBJECTIVE: Several papers have reported higher prevalence of diabetes mellitus (DM) type 2 in patients suffering from bipolar disorder (BD). The possible links between these 2 disorders include treatment, lifestyle, alterations in signal transduction, and possibly, a genetic link. To study this relation more closely, we investigated whether there are any differences in the clinical characteristics of BD patients with and without DM. METHOD: We compared the clinical data of 26 diabetic and 196 nondiabetic subjects from The Maritime Bipolar Registry. Subjects were aged 15 to 82 years, with psychiatric diagnoses of BD I (n = 151), BD II (n = 65), and BD not otherwise specified (n = 6). The registry included basic demographic data and details on the clinical course of bipolar illness, its treatment, and physical comorbidity. In a subsequent analysis using logistic regression, we examined the variables showing differences between groups, with diabetes as an outcome variable. RESULTS: The prevalence of DM in our sample was 11.7% (n = 26). Diabetic patients were significantly older than nondiabetic patients (P < 0.001), had higher rates of rapid cycling (P = 0.02) and chronic course of BD (P = 0.006), scored lower on the Global Assessment of Functioning Scale (P = 0.01), were more often on disability for BD (P < 0.001), and had higher body mass index (P < 0.001) and increased frequency of hypertension (P = 0.003). Lifetime history of treatment with antipsychotics was not significantly associated with an elevated risk of diabetes (P = 0.16); however, the data showed a trend toward more frequent use of antipsychotic medication among diabetic subjects. CONCLUSIONS: Our findings suggest that the diagnosis of DM in BD patients is relevant for their prognosis and outcome. 相似文献
27.
28.
29.
30.