首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   917篇
  免费   35篇
  国内免费   5篇
耳鼻咽喉   6篇
儿科学   12篇
妇产科学   20篇
基础医学   114篇
口腔科学   24篇
临床医学   84篇
内科学   174篇
皮肤病学   6篇
神经病学   96篇
特种医学   31篇
外科学   119篇
综合类   2篇
预防医学   51篇
眼科学   5篇
药学   51篇
中国医学   1篇
肿瘤学   161篇
  2023年   2篇
  2022年   10篇
  2021年   23篇
  2020年   9篇
  2019年   7篇
  2018年   14篇
  2017年   16篇
  2016年   23篇
  2015年   19篇
  2014年   27篇
  2013年   50篇
  2012年   75篇
  2011年   95篇
  2010年   44篇
  2009年   54篇
  2008年   52篇
  2007年   60篇
  2006年   87篇
  2005年   57篇
  2004年   73篇
  2003年   60篇
  2002年   43篇
  2001年   5篇
  2000年   1篇
  1999年   3篇
  1998年   3篇
  1997年   5篇
  1996年   8篇
  1995年   2篇
  1994年   8篇
  1993年   1篇
  1991年   4篇
  1990年   1篇
  1989年   3篇
  1988年   2篇
  1987年   1篇
  1984年   3篇
  1983年   1篇
  1982年   1篇
  1981年   1篇
  1973年   2篇
  1972年   1篇
  1968年   1篇
排序方式: 共有957条查询结果,搜索用时 15 毫秒
951.
952.
953.
The Maternal Adjustment and Maternal Attitudes Scale is a self- administered scale, designed for use in primary care settings to identify postpartum maternal adjustment problems regarding body image, sex, somatic symptoms, and marital relationships. Women were recruited within four weeks of giving birth. Responses to the Maternal Adjustment and Maternal Attitudes Scale were compared for agreement with responses to the Edinburgh Postnatal Depression Scale as a gold standard. Psychometric measurements included: reliability coefficients, explanatory factor analysis, and confirmatory analysis by linear structural relations. A receiver operating characteristic analysis was carried out to evaluate the global functioning of the scale. Of 300 mothers screened, 121 (40.7%) were experiencing difficulties in maternal adjustment and maternal attitudes. Scores on the Maternal Adjustment and Maternal Attitudes Scale correlated well with those on the Edinburgh Postnatal Depression Scale. The internal consistency of the Maternal Adjustment and Maternal Attitudes Scale, Greek version-tested using Cronbach's alpha coefficient-was 0.859, and that of Guttman split-half coefficient was 0.820. Findings confirmed the multidimensionality of the Maternal Adjustment and Maternal Attitudes Scale, demonstrating a six-factor structure. The area under the receiver operating characteristic curve was 0.610, and the logistic estimate for the threshold score of 57/58 fitted the model sensitivity at 68% and model specificity at 64.6%. Data confirmed that the Greek version of the Maternal Adjustment and Maternal Attitudes Scale is a reliable and valid screening tool for both clinical practice and research purposes to detect postpartum adjustment difficulties.  相似文献   
954.
Goal of work The aim of the study was to investigate the incidence of herpes simplex virus-1 (HSV-1) infection in mucositis during head and neck cancer radiotherapy.Patients and methods Sixty patients with malignant head and neck tumor, eligible to receive radiotherapy, who were referred to the Dental Oncology Unit, entered the study. Sixteen patients (26.6%) received concomitant chemotherapy. Mucositis was recorded weekly. Smears taken from the ulcers of mucositis grade 2, or 3, or 4 were stained with Papanicolaou and alkaline phosphatase/antialkaline phosphatase immunocytochemical method to identify HSV-1.Main results Forty-eight of all 60 patients developed ulcerative mucositis. Smear was available from 29 of 48 patients with ulcerations. HSV-1 infection was identified in 14 of 29 smears available (48.2%). Mucositis healed or was reduced after 1 week of antiviral treatment in 11 of those 14 HSV-1-positive patients; 3 patients responded to 1 g/day of valacyclovir, 7–2 g/day, and 1 patient responded to i.v. acyclovir. Ulcerations recurred after quitting antivirals. Three patients did not respond to 1 g/day of valacyclovir. No HSV-1-negative patient responded to acyclovir (P=0.000).Conclusion HSV-1 was isolated from 14 of 29 available smears taken from 48 patients with ulcerative mucositis. The incidence of HSV-1 infection during radiotherapy was estimated as being 14 of all 48 patients at risk (29.1%). Healing or reduction in the grade of mucositis after antivirals in HSV-1 positive patients, combined with the negative response to antivirals in HSV-1 negative patients, denoted that HSV-1 infection was a component of ulcerative radiation mucositis in those HSV-1-positive patients.  相似文献   
955.

Background

Although colorectal cancer (CRC) is a disease of the older patients, older patients are under-represented from randomized trials. Herein we conducted a retrospective analysis for the effect of panitumumab in the management of older patients (≥65?years) patients with metastatic CRC (mCRC) in the Hellenic Oncology Research Group's (HORG) database.

Methods

Τhe efficacy of panitumumab-based chemotherapy as front-line treatment in older patients with mCRC was assessed.

Results

In total, 110 older patients with KRAS exon 2 wild type tumors were treated with chemotherapy plus panitumumab. The median age was 74?years; 69.9% of the patients were male, with left-sided primary tumors (78.2%), ECOG Performance Status 0–1 (95.4%) and median number of metastatic sites 2. Sixty-two (Overall Response Rate-ORR: 56.4%; 95% CI: 48.8%–68.1%) achieved an objective response, while 21 (19.1%) had stable disease. Median Progression free survival (PFS) was 9.4?months (95% CI: 7.8–11.0?months) and median Overall survival (OS) 23.0?months (95% CI: 20.6–25.3?months). Additionally, a statistically significant difference in ORR (62.7% vs. 33.3%; p?=?.014), median PFS (12.9 vs. 5.7?months; p?=?.001) and median OS (31.6 vs. 16.7?months; p?<?.001) was observed in patients with left-sided compared to right-sided primary tumor. There was no treatment-related death. Grade 3–4 toxicities were neutropenia (8.9%) and diarrhea (14.5%) whereas skin rash grade 2 or 3 was recorded in 41.1% and 10.7%, respectively.

Conclusions

The results of this retrospective study provide the evidence that combination chemotherapy plus panitumumab is active and well tolerated in older patients with mCRC.  相似文献   
956.
The highly syndromic nature of succinate dehydrogenase‐deficient RCCs constitutes their active surveillance and molecular profiling the alpha and omega.  相似文献   
957.

Aim

We aimed to investigate the inter-individual variability in redox and physiological responses of antioxidant-deficient subjects after antioxidant supplementation.

Methods

Two hundred individuals were sorted by plasma vitamin C levels. A low vitamin C group (n = 22) and a control group (n = 22) were compared in terms of oxidative stress and performance. Subsequently, the low vitamin C group received for 30 days vitamin C (1 g) or placebo, in randomized, double-blind, crossover fashion, and the effects were examined through a mixed-effects model, while individual responses were calculated.

Results

The low vitamin C group exhibited lower vitamin C (−25 μmol/L; 95%CI[−31.7, −18.3]; p < 0.001), higher F2-isoprostanes (+17.1 pg/mL; 95%CI[6.5, 27.7]; p = 0.002), impaired VO2max (−8.2 mL/kg/min; 95%CI[−12.8, −3.6]; p < 0.001) and lower isometric peak torque (−41.5 Nm; 95%CI[−61.8, −21.2]; p < 0.001) compared to the control group. Regarding antioxidant supplementation, a significant treatment effect was found in vitamin C (+11.6 μmol/L; 95%CI[6.8, 17.1], p < 0.001), F2-isoprostanes (−13.7 pg/mL; 95%CI[−18.9, −8.4], p < 0.001), VO2max (+5.4 mL/kg/min; 95%CI[2.7, 8.2], p = 0.001) and isometric peak torque (+18.7; 95%CI[11.8, 25.7 Nm], p < 0.001). The standard deviation for individual responses (SDir) was greater than the smallest worthwhile change (SWC) for all variables indicating meaningful inter-individual variability. When a minimal clinically important difference (MCID) was set, inter-individual variability remained for VO2max, but not for isometric peak torque.

Conclusion

The proportion of response was generally high after supplementation (82.9%–95.3%); however, a few participants did not benefit from the treatment. This underlines the potential need for personalized nutritional interventions in an exercise physiology context.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号