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   107168篇
  免费   8135篇
  国内免费   381篇
耳鼻咽喉   1176篇
儿科学   2654篇
妇产科学   1732篇
基础医学   15172篇
口腔科学   2298篇
临床医学   10847篇
内科学   22725篇
皮肤病学   1857篇
神经病学   11576篇
特种医学   4338篇
外国民族医学   6篇
外科学   15239篇
综合类   1311篇
一般理论   73篇
预防医学   8399篇
眼科学   1881篇
药学   7248篇
中国医学   119篇
肿瘤学   7033篇
  2023年   545篇
  2022年   956篇
  2021年   2208篇
  2020年   1377篇
  2019年   2048篇
  2018年   2512篇
  2017年   1851篇
  2016年   2213篇
  2015年   2568篇
  2014年   3368篇
  2013年   4464篇
  2012年   6889篇
  2011年   6916篇
  2010年   4085篇
  2009年   3722篇
  2008年   6156篇
  2007年   6642篇
  2006年   6187篇
  2005年   6132篇
  2004年   5722篇
  2003年   5115篇
  2002年   5054篇
  2001年   2050篇
  2000年   1951篇
  1999年   1797篇
  1998年   1280篇
  1997年   1046篇
  1996年   853篇
  1995年   864篇
  1994年   753篇
  1993年   687篇
  1992年   1268篇
  1991年   1164篇
  1990年   1101篇
  1989年   1072篇
  1988年   942篇
  1987年   900篇
  1986年   928篇
  1985年   906篇
  1984年   730篇
  1983年   647篇
  1982年   605篇
  1981年   499篇
  1980年   427篇
  1979年   586篇
  1978年   452篇
  1977年   408篇
  1975年   365篇
  1974年   404篇
  1973年   385篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
International Journal of Clinical Oncology - Immune-checkpoint inhibitors (ICIs) are standard treatments for metastatic non-small cell lung cancer (NSCLC). Patients with poor performance status...  相似文献   
5.
6.
The current study explored the influence of three methods of parental emotion discourse (structured story-telling, reminiscing, and picture book) and their relation to preschoolers’ emotion understanding. Thirty-seven families participated in the study. Analyses showed that the structured story-telling method produced more emotion words, was high in unique emotion words, and was high for both emotion labelling and explanations. All three methods showed some potential to predict preschooler’s emotion understanding. Structured story-telling was best at predicting role-taking, while reminiscing and the picture book both were better at predicting situation knowledge. Additional studies are needed to further explore the influence of different methods of assessing emotion discourse to enhance validity and reliability of research in this field.  相似文献   
7.
8.
9.

Objective

Comparative survival between neoadjuvant chemotherapy and adjuvant chemotherapy for patients with cT2-4N0-1M0 non–small cell lung cancer has not been extensively studied.

Methods

Patients with cT2-4N0-1M0 non–small cell lung cancer who received platinum-based chemotherapy were retrospectively identified. Exclusion criteria included stage IV disease, induction radiotherapy, and targeted therapy. The primary end point was disease-free survival. Secondary end points were overall survival, chemotherapy tolerance, and ability of Response Evaluation Criteria In Solid Tumors response to predict survival. Survival was estimated using the Kaplan–Meier method, compared using the log-rank test and Cox proportional hazards models, and stratified using matched pairs after propensity score matching.

Results

In total, 330 patients met the inclusion criteria (n = 92/group after propensity-score matching; median follow-up, 42 months). Five-year disease-free survival was 49% (95% confidence interval, 39-61) for neoadjuvant chemotherapy versus 48% (95% confidence interval, 38-61) for adjuvant chemotherapy (P = .70). On multivariable analysis, disease-free survival was not associated with neoadjuvant chemotherapy or adjuvant chemotherapy (hazard ratio, 1.1; 95% confidence interval, 0.64-1.90; P = .737), nor was overall survival (hazard ratio, 1.21; 95% confidence interval, 0.63-2.30; P = .572). The neoadjuvant chemotherapy group was more likely to receive full doses and cycles of chemotherapy (P = .014/0.005) and had fewer grade 3 or greater toxicities (P = .001). Response Evaluation Criteria In Solid Tumors response to neoadjuvant chemotherapy was associated with disease-free survival (P = .035); 15% of patients receiving neoadjuvant chemotherapy (14/92) had a major pathologic response.

Conclusions

Timing of chemotherapy, before or after surgery, is not associated with an improvement in overall or disease-free survival among patients with cT2-4N0-1M0 non–small cell lung cancer who undergo complete surgical resection.  相似文献   
10.
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