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   11812篇
  免费   752篇
  国内免费   66篇
耳鼻咽喉   119篇
儿科学   329篇
妇产科学   231篇
基础医学   1343篇
口腔科学   529篇
临床医学   906篇
内科学   2637篇
皮肤病学   228篇
神经病学   715篇
特种医学   358篇
外国民族医学   4篇
外科学   1881篇
综合类   490篇
一般理论   10篇
预防医学   726篇
眼科学   308篇
药学   1045篇
中国医学   68篇
肿瘤学   703篇
  2023年   160篇
  2022年   164篇
  2021年   613篇
  2020年   449篇
  2019年   526篇
  2018年   650篇
  2017年   375篇
  2016年   389篇
  2015年   419篇
  2014年   560篇
  2013年   680篇
  2012年   978篇
  2011年   974篇
  2010年   489篇
  2009年   416篇
  2008年   622篇
  2007年   623篇
  2006年   561篇
  2005年   555篇
  2004年   555篇
  2003年   437篇
  2002年   438篇
  2001年   88篇
  2000年   71篇
  1999年   67篇
  1998年   73篇
  1997年   36篇
  1996年   43篇
  1995年   57篇
  1994年   39篇
  1993年   27篇
  1992年   22篇
  1991年   38篇
  1990年   39篇
  1989年   37篇
  1988年   31篇
  1987年   26篇
  1986年   41篇
  1985年   23篇
  1984年   28篇
  1983年   25篇
  1982年   17篇
  1981年   24篇
  1980年   19篇
  1979年   21篇
  1978年   10篇
  1977年   10篇
  1974年   10篇
  1973年   8篇
  1970年   10篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
International Ophthalmology - To investigate the efficacy and safety of non-valved Aurolab aqueous drainage implant (AADI) surgery combined with phacoemulsification in eyes with refractory glaucoma...  相似文献   
2.
3.
Purpose: The purpose of this study was to examine the effect of prostate cancer educational program on the level of knowledge and intention to screen for prostate cancer among Jordanian men in Amman. Methods: A quasi-experimental, with nonequivalent control group design was used. 154 participants were randomly assigned to the intervention and control groups.  Level of Knowledge and intention to screen were measured at baseline and at 1 month after the application of the prostate cancer educational program. Independent sample t-test was used to analyze the data. Results: The results showed statistically significant change in the mean knowledge scores (8.7), p < 0.001 and the mean of intention to screen scores (3.71), p < 0.001, after 1 month from the application of the educational program in the experimental group compared to the control group. Conclusion: Implementing prostate cancer educational programs help enhance knowledge and intention to screen among Jordanian men.  相似文献   
4.
Cancer Chemotherapy and Pharmacology - CC-486 is an oral formulation of azacitidine that allows for extended dosing schedules to prolong azacitidine exposure to malignant cells and maximize...  相似文献   
5.
6.
Introduction

Identification of groups of patients or interventions with higher associated treatment costs may be beneficial in efforts to decrease the overall financial burden of glioblastoma (GBM) treatment. The authors’ objective was to evaluate perioperative surgical treatment cost differences between elderly and nonelderly patients with GBM using the Value Driven Outcome (VDO) database.

Methods

The authors obtained data from a retrospective cohort of GBM patients treated surgically (resection or biopsy) at their institution from August 2011 to February 2018. Data were compiled using medical records and the VDO database.

Results

A total of 181 patients with GBM were included. Patients were grouped into age?<?70 years at time of surgery (nonelderly; n?=?121) and?≥?70 years (elderly; n?=?60). Costs were approximately 38% higher in the elderly group on average (each patient was mean 0.68% of total cohort cost vs. 0.49%, p?=?0.044). Higher age significantly, but weakly, correlated with higher treatment cost on linear regression analysis (p?=?0.007; R2?=?0.04). Length of stay was significantly associated with increased cost on linear regression (p?<?0.001, R2?=?0.84) and was significantly longer in the elderly group (8.7?±?11.3 vs. 5.2?±?4.3 days, p?=?0.025). The cost breakdown by facility, pharmacy, supply/implants, imaging, and laboratory costs was not significantly different between age groups. Elderly patients with any postoperative complication had 2.1 times greater total costs than those without complication (p?=?0.094), 2.9 times greater total costs than nonelderly patients with complication (p?=?0.013), and 2.3 times greater total costs than nonelderly patients without complication (p?=?0.022).

Conclusions

GBM surgical treatment costs are higher in older patients, particularly those who experience postoperative complications.

  相似文献   
7.
Cervical cancer is a major public health problem that continues to be one of the leading female genital cancersworldwide. In the kingdom of Saudi Arabia (KSA), cervical cancer ranks the fifteenth most frequent cancer amongfemales. This study is the first published research study addressing the screening of cervical cancer in Madinah regionof KSA. Aim: To evaluate the abnormal cytological entities detected by cervical Pap smear in Madinah region of KSAand to compare the results with other national and international studies. Methods: This retrospective case-control studywas conducted in the Departments of Obstetrics and Gynecology, and Histopathology at the Maternity and ChildrenHospital (MCH), Madinah, KSA from January 2013 to December 2015. Results: Of the 1594 cases reviewed, only38 cases (2.4%) had epithelial cell abnormalities. High grade squamous intraepithelial lesions (HSIL) and low gradesquamous intraepithelial lesions (LSIL) were the most common diagnosis categories, and cervical cancer accountedfor 36.8% of the total cases for each, followed by atypical squamous cells of uncertain significance (ASCUS) foundin (15.9%). Squamous cell carcinoma (SCC ) was found in (5.3%) of the cases. Patients with abnormal epithelialchanges had higher parity (P=0.021) and presented more with a complaint of postcoital bleeding (P<0.0001), tend tohave abnormal cervical appearance (P=0.004), more likely bleeding on touch (P=0.001) and associated with cervicalerosion (P=0.014). Conclusion: The study showed a relatively low prevalence of epithelial cell lesions. These lesionswere mainly squamous cell lesions harbored by females who have an abnormal cervical appearance, and those withhigh parity who were lacking cervical screening program.  相似文献   
8.
9.
10.
The aim of the present study was to establish survival rates, as well as crestal bone loss (CBL) of narrow diameter implants (NDI), compared to regular diameter implants (RDI). The current review followed the Enhancing the QUAlity and Transparency Of health Research guidelines and Preferred Reporting Items for Systematic Reviews and Meta‐Analyses statement. We searched main databases (MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials, and Cochrane Oral Health Group Trials Register) for articles addressing the focused question up to and including May 2018. Meta‐analyses were conducted for CBL and survival rates. Qualitatively, three clinical studies showed comparable CBL and survival rates between NDI and RDI at follow up. Only one study showed increased CBL around NDI compared to RDI. The overall weighted mean difference (WMD) for CBL (WMD = .06, 95% confidence interval [CI] = ‐.38‐.51, P=.76) and risk difference for survival rate (risk difference = .88, 95% CI = .22‐3.50, P=.85) were not significant between the NDI and RDI groups at follow up. NDI and RDI showed comparable CBL and survival rates. However, the findings of the present study should be interpreted with caution due to significant heterogeneity and the low number of included studies. Further randomized, controlled trials should be performed in order to obtain strong conclusions.  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