全文获取类型
收费全文 | 12487篇 |
免费 | 934篇 |
国内免费 | 81篇 |
专业分类
耳鼻咽喉 | 122篇 |
儿科学 | 300篇 |
妇产科学 | 249篇 |
基础医学 | 1761篇 |
口腔科学 | 178篇 |
临床医学 | 963篇 |
内科学 | 2855篇 |
皮肤病学 | 461篇 |
神经病学 | 924篇 |
特种医学 | 465篇 |
外国民族医学 | 1篇 |
外科学 | 1934篇 |
综合类 | 255篇 |
一般理论 | 7篇 |
预防医学 | 667篇 |
眼科学 | 414篇 |
药学 | 709篇 |
中国医学 | 56篇 |
肿瘤学 | 1181篇 |
出版年
2024年 | 16篇 |
2023年 | 107篇 |
2022年 | 207篇 |
2021年 | 362篇 |
2020年 | 257篇 |
2019年 | 356篇 |
2018年 | 360篇 |
2017年 | 295篇 |
2016年 | 358篇 |
2015年 | 429篇 |
2014年 | 552篇 |
2013年 | 556篇 |
2012年 | 914篇 |
2011年 | 876篇 |
2010年 | 498篇 |
2009年 | 441篇 |
2008年 | 675篇 |
2007年 | 649篇 |
2006年 | 604篇 |
2005年 | 630篇 |
2004年 | 552篇 |
2003年 | 483篇 |
2002年 | 483篇 |
2001年 | 355篇 |
2000年 | 346篇 |
1999年 | 265篇 |
1998年 | 109篇 |
1997年 | 75篇 |
1996年 | 80篇 |
1995年 | 67篇 |
1994年 | 61篇 |
1993年 | 50篇 |
1992年 | 142篇 |
1991年 | 138篇 |
1990年 | 148篇 |
1989年 | 130篇 |
1988年 | 143篇 |
1987年 | 119篇 |
1986年 | 89篇 |
1985年 | 92篇 |
1984年 | 74篇 |
1983年 | 64篇 |
1982年 | 23篇 |
1981年 | 27篇 |
1980年 | 22篇 |
1979年 | 45篇 |
1978年 | 27篇 |
1977年 | 27篇 |
1976年 | 18篇 |
1974年 | 19篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
2.
M. Alexandra Friedman Charlotte M. Niznik Janelle R. Bolden Lynn M. Yee 《Journal of community health》2016,41(2):354-358
While peer support has been investigated in multiple clinical contexts, its application to the postpartum setting is unknown. The aim was to assess acceptability of a postpartum peer support program for women with diabetes. Observational survey-based needs assessment of forty low-income women with diabetes, receiving care at a major medical institution. Mean age and gravidity were 30.7 years and 3.15 ± 1.67 respectively. 45 % expressed interest in a “buddy.” There was no significant difference between groups desiring and not desiring this program. A majority of respondents desired telephone, text messaging, and in-person contacts (79.2, 72.1, 83.8 %), with 72.5 % of patients desiring diabetes-related activities during clinic waiting time. Many women desire a postpartum diabetes reciprocal peer program for support outside of clinician visits. Patients are receptive to educational services during their wait and outside of clinic time, a potentially valuable opportunity to share important health information. 相似文献
3.
4.
Christine E. East Fung Yee Chan Shaun P. Brennecke James F. King Paul B. Colditz 《分娩》2006,33(2):101-109
Abstract: Background: Fetal pulse oximetry improves the assessment of fetal well‐being during labor. The objective of this study was to evaluate women's satisfaction with their experience with this additional technology. Methods: We surveyed women participating in the FOREMOST trial, a randomized controlled trial comparing the addition of fetal pulse oximetry (FPO) to conventional cardiotocograph (CTG) monitoring (intervention group), versus CTG‐only (control group), in the presence of nonreassuring fetal status during labor. Our survey evaluated 3 aspects of women's experience: labor, fetal monitoring, and participation in the research. The survey was administered within a few days of giving birth and repeated 3 months later. Results: No differences were found between the intervention and control groups for women's evaluations of their labor, fetal monitoring, research, or overall experiences when surveyed on both occasions. Within each study group, a small but statistically significant decline occurred in women's scores for their experience of labor and overall experience from the initial survey close to the time of giving birth, to 3 months later. The magnitude of differences in responses over time was similar for the both groups. Women were more satisfied after a spontaneous or assisted vaginal birth than after cesarean section. Length of time the research midwife was present had a significant positive effect on women's ratings of their experience several days after giving birth (p = 0.006), but no effect at 3 months. Conclusions: The addition of fetal pulse oximetry for the assessment of fetal well‐being during labor did not affect childbearing women's perceptions of fetal monitoring or their labor. Women evaluated their experience in the research process positively overall. Small changes occurred in women's perception of their satisfaction over time. (BIRTH 33:2 June 2006) 相似文献
5.
T Misaki S Dokoh T Koh S Shimbo A Hidaka Y Iida K Kasagi J Konishi 《Kaku igaku. The Japanese journal of nuclear medicine》1991,28(2):157-161
In the clinical management of Graves' thyrotoxicosis, one of the most important subject is when to stop antithyroid drugs after achieving an euthyroid state. T3 suppression test and other methods have been used to forecast the outcome after drug cessation, but the results were not always satisfactory. We have attempted to predict remission of Graves' disease by single measurement of early technetium uptake without administration of triiodothyronine. Drugs were discontinued in the seventy-five patients with Graves' disease on maintenance doses of either methimazole or propylthiouracil who showed normalized uptake (4.0% or less). Of 64 patients evaluable after twelve months, 55 (86%) remained euthyroid, 8 relapsed, and 1 became hypothyroid. With its accuracy in prediction of short-term remission comparable or superior to T3 suppression test, this rapid and simple method seemed suitable for routine use in clinical practice. 相似文献
6.
7.
Intracranial pathology is a common and important complication in extremely low birth weight babies. Lenticulostriate vasculopathy (LSV) is an abnormal finding on cranial ultrasounds of sick babies and has been associated with congenital infection, chromosomal aberration and twin-to-twin transfusion. We describe a previously unreported situation of LSV being detected in both donor and recipient twin. This pair of monochorionic, diamniotic twins was admitted to the Neonatal Intensive Care Unit at 28 weeks of gestation. The mother underwent an emergency caesarean section because ultrasound and Doppler studies showed stage III twin-to-twin transfusion syndrome. The first twin weighed 998 g and second twin weighed 600 g. The first twin had an uneventful stay, whereas the second twin needed prolonged continuous positive airway pressure and indomethacin for patent ductus arteriosus. Both of them developed LSV. The clinical significance of this condition on the neuro-developmental outcome of a neonate has not yet been fully determined. 相似文献
8.
We report a full-term male infant born to nonconsanguinous parents who had clinical features of Goldenhar syndrome and cri du chat syndrome. At birth, the infant was noted to have dysmorphic features with bilateral preauricular tags, rotated ears, bilateral epicanthic folds, a left epibulbar lipodermoid, and an accessory left nipple. After he was assessed for feeding difficulty and tachypnea, he was found to have esophageal atresia with tracheoesophageal fistula. In addition, he had a high-pitched, cat-like cry, characteristic of cri-du-chat syndrome. He also failed a hearing test. Chromosomal analysis and fluorescence in situ hybridisation studies showed an unbalanced karyotype with a terminal deletion of the segment p14 on the short arm of chromosome 5, which is consistent with the cri-du-chat locus. The association of Goldenhar syndrome and cri-du-chat syndrome in this patient suggests that the chromosome 5p14 locus may harbor a gene implicated with Goldenhar syndrome. 相似文献
9.
Selecting an appropriate working correlation structure is pertinent to clustered data analysis using generalized estimating equations (GEE) because an inappropriate choice will lead to inefficient parameter estimation. We investigate the well‐known criterion of QIC for selecting a working correlation structure, and have found that performance of the QIC is deteriorated by a term that is theoretically independent of the correlation structures but has to be estimated with an error. This leads us to propose a correlation information criterion (CIC) that substantially improves the QIC performance. Extensive simulation studies indicate that the CIC has remarkable improvement in selecting the correct correlation structures. We also illustrate our findings using a data set from the Madras Longitudinal Schizophrenia Study. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
10.
V Ahern E‐S Koh V Gebski Y Sathiyaseelan 《Journal of Medical Imaging and Radiation Oncology》2007,51(5):458-464
The purpose of this study was to document how children in Australia with medulloblastoma are being treated and to evaluate the quality of radiotherapy (RT) delivered. The Radiotherapy Database of the Australian and New Zealand Children’s Haematology and Oncology Group was used to identify 46 children with medulloblastoma younger than the age of 15 years treated with radical intent by craniospinal irradiation between 1997 and 1999 inclusively. Twenty‐six patients had completely resected disease without evidence of disease spread. Of these, 16 patients received a craniospinal RT dose of <25 Gy in addition to chemotherapy. RT treatment immobilization methods varied, as did planning methods. RT dose to critical structures was recorded on treatment plans for only 15% of patients. The average systematic error in shield placement at the posterior orbit was 5.2 mm, and two‐thirds of patients were ‘overshielded’ at this site. Adequate coverage of the distal end of the thecal sac was achieved in fewer than 50% of on‐treatment verification films for 21 of 45 patients. With a reduction in RT dose to the craniospinal axis for paediatric medulloblastoma, greater attention is needed for patient immobilization, documentation of RT dose to critical structures and the placement and reproducibility of shielding. 相似文献