全文获取类型
收费全文 | 55329篇 |
免费 | 3753篇 |
国内免费 | 187篇 |
专业分类
耳鼻咽喉 | 552篇 |
儿科学 | 1801篇 |
妇产科学 | 1405篇 |
基础医学 | 7563篇 |
口腔科学 | 698篇 |
临床医学 | 7230篇 |
内科学 | 11333篇 |
皮肤病学 | 909篇 |
神经病学 | 5638篇 |
特种医学 | 1466篇 |
外国民族医学 | 1篇 |
外科学 | 5065篇 |
综合类 | 792篇 |
一般理论 | 43篇 |
预防医学 | 5535篇 |
眼科学 | 991篇 |
药学 | 3845篇 |
中国医学 | 95篇 |
肿瘤学 | 4307篇 |
出版年
2023年 | 257篇 |
2022年 | 467篇 |
2021年 | 1103篇 |
2020年 | 625篇 |
2019年 | 1001篇 |
2018年 | 1175篇 |
2017年 | 912篇 |
2016年 | 1027篇 |
2015年 | 1203篇 |
2014年 | 1664篇 |
2013年 | 2456篇 |
2012年 | 3678篇 |
2011年 | 3924篇 |
2010年 | 2015篇 |
2009年 | 1931篇 |
2008年 | 3465篇 |
2007年 | 3726篇 |
2006年 | 3727篇 |
2005年 | 3649篇 |
2004年 | 3521篇 |
2003年 | 3314篇 |
2002年 | 3091篇 |
2001年 | 769篇 |
2000年 | 680篇 |
1999年 | 790篇 |
1998年 | 624篇 |
1997年 | 518篇 |
1996年 | 484篇 |
1995年 | 446篇 |
1994年 | 352篇 |
1993年 | 375篇 |
1992年 | 478篇 |
1991年 | 464篇 |
1990年 | 450篇 |
1989年 | 428篇 |
1988年 | 379篇 |
1987年 | 315篇 |
1986年 | 314篇 |
1985年 | 355篇 |
1984年 | 309篇 |
1983年 | 282篇 |
1982年 | 304篇 |
1981年 | 223篇 |
1980年 | 227篇 |
1979年 | 217篇 |
1978年 | 145篇 |
1977年 | 168篇 |
1976年 | 139篇 |
1975年 | 124篇 |
1974年 | 125篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
C. Rossi P. Cellocco F. Bizzarri E. Margaritondo G. Costanzo 《Journal of orthopaedics and traumatology》2005,6(3):145-149
Abstract
Surgical management of trapeziometacarpal joint osteoarthritis (OA) is still controversial. The aim of this study was to evaluate
and compare results of trapeziometacarpal arthrodesis and of tendon interposition arthroplasty. One hundred twenty-six patients
suffering from trapeziometacarpal OA underwent surgery between 1996 and 2001. Of these patients, 62 (78 thumbs) treated with
joint arthrodesis and 33 (41 thumbs) treated with tendon interposition arthroplasty with abductor pollicis longus (APL) have
been evaluated at follow-up and therefore entered this study. Mean age was 53 years, while the mean follow-up was 36 months.
Overall results were satisfactory in 84 patients with good pain improvement. Patients treated with arthrodesis showed better
functional ability in bi-digital pinch and grip strength. First finger opposition motion, however, was better conserved in
patients treated with interposition arthroplasty. Fusions had an 11.5% complication rate (9 thumbs) with nonunions, whereas
14.8% (6 thumbs) of patients treated with interposition arthroplasty developed 1 first metacarpal base collapse, resulting
in 1 first ray length reduction. Despite complications, however, patients did not report unsatisfactory results and generally
experienced marked pain reduction. This study shows that arthrodesis can be considered the treatment of choice in patients
suffering from trapeziometacarpal OA at Eaton stage III or less, whatever the age and when a good pinch strength is needed. 相似文献
122.
Sukal Sean A. MD PhD † Tudisco Marie HT † Strippoli Barbara HT † Nehal Kishwer S. MD † 《Dermatologic surgery》2005,31(7):763-766
Background Processing multiple tissue sections in large Mohs cases is time consuming and labor intensive.
Objective To present innovative laboratory techniques to facilitate processing of large Mohs cases.
Methods A method for processing a large dermatofibrosarcoma protuberans Mohs case is outlined.
Results Modifications in tissue processing and equipment employed in a large Mohs case are presented.
Conclusion Innovative modifications to the standard Mohs laboratory technique can facilitate processing of large Mohs cases, resulting in high-quality, rapid frozen sections while optimizing efficiency. 相似文献
Objective To present innovative laboratory techniques to facilitate processing of large Mohs cases.
Methods A method for processing a large dermatofibrosarcoma protuberans Mohs case is outlined.
Results Modifications in tissue processing and equipment employed in a large Mohs case are presented.
Conclusion Innovative modifications to the standard Mohs laboratory technique can facilitate processing of large Mohs cases, resulting in high-quality, rapid frozen sections while optimizing efficiency. 相似文献
123.
124.
Colleen Delaney Barbara Piscopo 《Journal for nurses in staff development》2004,20(4):157-61; quiz 162-3
The nursing profession is facing a serious shortage in all areas including BSN completion programs. The purpose of this study was to explore associate degree and diploma nurses' perceptions of the benefits and barriers to RN-BSN programs. In addition, factors that would facilitate degree completion in academia and work environments were examined. 相似文献
125.
126.
127.
Shelley E Taylor Barbara J Lehman Catarina I Kiefe Teresa E Seeman 《Neuropsychopharmacology》2006,60(8):819-824
BACKGROUND: Low socioeconomic status (SES) and a harsh family environment in childhood have been linked to mental and physical health disorders in adulthood. The objective of the present investigation was to evaluate a developmental model of pathways that may help explain these links and to relate them to C-reactive protein (CRP) in the Coronary Artery Risk Development in Young Adults (CARDIA) dataset. METHODS: Participants (n = 3248) in the CARDIA study, age 32 to 47 years, completed measures of childhood SES (CSES), early family environment (risky families [RF]), adult psychosocial functioning (PsyF, a latent factor measured by depression, mastery, and positive and negative social contacts), body mass index (BMI), and C-reactive protein. RESULTS: Structural equation modeling indicated that CSES and RF are associated with C-reactive protein via their association with PsyF (standardized path coefficients: CSES to RF, RF to PsyF, PsyF to CRP, CSES to CRP, all p < .05), with good overall model fit. The association between PsyF and CRP was partially mediated by BMI (PsyF to BMI, BMI to CRP, both p < .05). CONCLUSIONS: Low childhood SES and a harsh early family environment appear to be related to elevated C-reactive protein in adulthood through pathways involving psychosocial dysfunction and high body mass index. 相似文献
128.
M. L. Garrè V. Capra E. Di Battista L. Giampietri P. Nozza A. Raso A. Pezzolo A. Rossi C. Milanaccio M. Pavanello A. Naselli 《Child's nervous system》2007,23(2):219-223
Objects Genetic syndromes associated with ependymoma are uncommon, with the exception of NF2. We describe two cases of ependymoma
presenting with Klinefelter’s Syndrome (KS) as co-morbid condition.
Materials and methods The first patient was diagnosed for KS during pregnancy; he also presented a thyroid agenesis and a deficit of methyltetrahydrofolate
reductase (MTHFR); at 30 months of age he was operated on for a grade II ependymoma of IV ventricle; after a multiple-stage
surgery, he underwent oral chemotherapy and stereotactic radiotherapy, but after 15 months he presented a local recurrence
and died. The second patient was diagnosed for KS at the age of 16 months; at 10 years of age, due to back pain, he underwent
an MRI, which showed a cauda equine tumor. He underwent surgery and radiotherapy. Histology was of mixopapillary ependymoma.
Conclusion In a review of literature, various neoplasms have been described in association with KS. To our knowledge, these are the first
two cases reported of ependymoma associated to KS. A retrospective study of 44 monoinstitutional ependymoma cases demonstrated
association with genetic syndromes in 22%. 相似文献
129.
Scott Lozanoff Barbara A. Long David L. Singer John J. Deptuch 《Journal of clinical periodontology》1992,19(8):553-559
Deposits of dental plaque or calculus are typically quantified using planimetric techniques. However, error is introduced into a quantitative analysis of plaque deposits using these methods, since they require a significant amount of human intervention. The purpose of this study is to describe and validate a computerized imaging routine which has the potential to objectively identify material on dental roots and measure the area covered by these deposits. Dentiform teeth with simulated plaque were videorecorded. A computer routine was developed based on a flood-fill algorithm which analyzed images of the dentiform teeth and determined the amount of simulated plaque on their root surfaces. Results showed that the dentiform teeth and their simulated plaque patterns are duplicated by the imaging routine in a rapid and reliable fashion. The system shows a high degree of accuracy with an average error factor of only 0.58%. As well, the system enables precise reproducibility with an average error factor of only 0.71%. 相似文献
130.