全文获取类型
收费全文 | 126759篇 |
免费 | 9591篇 |
国内免费 | 421篇 |
专业分类
耳鼻咽喉 | 1237篇 |
儿科学 | 3549篇 |
妇产科学 | 2498篇 |
基础医学 | 17286篇 |
口腔科学 | 2498篇 |
临床医学 | 14532篇 |
内科学 | 26298篇 |
皮肤病学 | 2233篇 |
神经病学 | 13195篇 |
特种医学 | 4569篇 |
外国民族医学 | 6篇 |
外科学 | 16622篇 |
综合类 | 1586篇 |
一般理论 | 101篇 |
预防医学 | 11566篇 |
眼科学 | 2081篇 |
药学 | 8430篇 |
中国医学 | 145篇 |
肿瘤学 | 8339篇 |
出版年
2023年 | 746篇 |
2022年 | 1311篇 |
2021年 | 2529篇 |
2020年 | 1656篇 |
2019年 | 2513篇 |
2018年 | 3038篇 |
2017年 | 2284篇 |
2016年 | 2672篇 |
2015年 | 3072篇 |
2014年 | 4076篇 |
2013年 | 5595篇 |
2012年 | 8553篇 |
2011年 | 8578篇 |
2010年 | 5019篇 |
2009年 | 4607篇 |
2008年 | 7511篇 |
2007年 | 8165篇 |
2006年 | 7595篇 |
2005年 | 7610篇 |
2004年 | 7122篇 |
2003年 | 6376篇 |
2002年 | 6271篇 |
2001年 | 2087篇 |
2000年 | 1954篇 |
1999年 | 1853篇 |
1998年 | 1506篇 |
1997年 | 1207篇 |
1996年 | 996篇 |
1995年 | 1011篇 |
1994年 | 866篇 |
1993年 | 782篇 |
1992年 | 1259篇 |
1991年 | 1162篇 |
1990年 | 1118篇 |
1989年 | 1063篇 |
1988年 | 936篇 |
1987年 | 882篇 |
1986年 | 903篇 |
1985年 | 914篇 |
1984年 | 766篇 |
1983年 | 647篇 |
1982年 | 643篇 |
1981年 | 530篇 |
1980年 | 464篇 |
1979年 | 563篇 |
1978年 | 461篇 |
1977年 | 406篇 |
1975年 | 361篇 |
1974年 | 374篇 |
1973年 | 367篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
161.
162.
Michael J. Bernas Robert L. Askew Jane M. Armer Janice N. Cormier 《Current breast cancer reports》2010,2(1):53-58
Lymphedema is an under-recognized, progressive, life-long condition estimated to impact 2-3 million people in the United States.
The incidence of breast cancer related lymphedema varies greatly in the literature largely due to different measurement techniques,
competing thresholds for defining lymphedema, and variation in length of follow-up. Multiple imaging techniques have become
useful for diagnosis. Lymphoscintigraphy is one of the most commonly used, as it can identify pathways of lymphatic drainage,
quantify extent of dermal backflow, and help determine functional and morphologic changes in the lymphatic system. Early detection
and intervention hold the greatest promise of reducing the incidence of lymphedema. Health care providers involved with cancer
patients need to become more educated about lymphedema, aware of current risk-reduction practices, and familiar with methods
of diagnosis and assessment, so that patients with early swelling can be referred to lymphedema treatment specialists at a
time when treatment is more effective. 相似文献
163.
164.
165.
166.
167.
The loss of available iodine from povidone-iodine solution stored in contact with two different polyetherpolyurethane foams was monitored as a function of time and temperature. Statistical evaluation of the results for the four temperatures studied [ambient (25 degrees), 30, 45 and 55 degrees C] indicated the chemical equivalence of the two foams as storage and delivery systems for povidone-iodine solution in terms of solution stability. In addition, application of a first-order kinetic model to the data produced an acceptable fit. An Arrhenius-type evaluation of the resulting rate constants yielded a linear relationship which was shown to be useful for predicting loss of available iodine under ambient temperature conditions of storage. 相似文献
168.
169.
Mark Chaffin Jane F Silovsky Christy Vaughn 《Journal of clinical child and adolescent psychology》2005,34(2):210-222
This study examined the temporal concordance between the onset of childhood anxiety disorders and the points of onset and ending of child sexual abuse (CSA). Sexually abused children (N = 158) were assessed with structured diagnostic interviews. Onset ages for lifetime prevalence anxiety disorders were combined and sequenced with the onset and ending of sexual abuse. Hazard rates were calculated. Departures from the overall linear hazard trajectory for onsets were modeled using piecewise growth curve analyses. Increases from the overall trajectory were found around the point of sexual abuse onset for most childhood anxiety disorders. Decreases were found around the ending of sexual abuse. The risk for developing new anxiety disorders after the onset of sexual abuse showed a positive dose-effect relation with abuse severity. The findings add support to the idea that CSA can have a direct link to childhood anxiety disorders, apart from confounded vulnerability factors, postabuse events, or stable family background factors. The findings are contrasted with those from cross-sectional partial correlation studies that have suggested that there is little direct connection between sexual abuse and mental health outcomes. 相似文献
170.
Abdulbari BENER Omer F. EL‐RUFAIE Saadat KAMRAN Ana B. GEORGIEVSKI Abdulaziz FAROOQ Martin RYSAVY 《International journal of rheumatic diseases》2006,9(3):257-263
Objective: The aim of this study was to determine the prevalence of low back pain (LBP) in a primary care setting population and examine its association with the symptoms of depression and somatization. Methods: This is a cross‐sectional study, utilising a survey carried out in primary health care clinics (PHCs) in Al‐Ain, United Arab Emirates (UAE). A multistage stratified sampling design was used and a representative sample of 1304 UAE nationals aged 18–65 years who attended PHC clinics for any reason were included and 1103 (84.5%) subjects agreed to participate and responded to the questionnaire during a period from June 2001 to January 2002. A specially designed questionnaire with three parts was used for the data collection: socio‐demographic information of the studied subjects, modified version of the Roland‐Morris scale for evaluating back‐related functional disability and SCL‐90 R for depression and somatization subscales was used to assess depressive and somatic symptoms. Results: Of the total number of subjects surveyed (1103), 586 (53.1%) were men and 517 (46.9%) women. The mean age was 34.9 ± 13.4 years for men and 33.5 ± 11.8 years for women. The prevalence of LBP in the studied subjects was 64.7% (95% CI, 60.7–68.5] with 46.7% among men and 53.3% among women. There were a significant differences between the subjects with LBP and without LBP with respect to gender (P < 0.001), body mass index (BMI) (P < 0.001), occupational status (P < 0.001) and living environment (P = 0.016). Functional disability was higher in patients with LBP. Young patients in aged 15–34 years, patients with preparatory/secondary educational level and students showed higher depressive symptoms. A similar pattern was found in patients with somatic symptoms. Factor analysis revealed a strong association between depression and somatization in LBP patients. Conclusions: Functional disability was higher in with LBP. Furthermore, symptoms of depression and somatization are prevalent among LBP patients. 相似文献