全文获取类型
收费全文 | 41957篇 |
免费 | 4856篇 |
国内免费 | 2889篇 |
专业分类
耳鼻咽喉 | 417篇 |
儿科学 | 597篇 |
妇产科学 | 429篇 |
基础医学 | 3981篇 |
口腔科学 | 652篇 |
临床医学 | 5021篇 |
内科学 | 5507篇 |
皮肤病学 | 340篇 |
神经病学 | 1827篇 |
特种医学 | 1664篇 |
外国民族医学 | 11篇 |
外科学 | 4228篇 |
综合类 | 9403篇 |
一般理论 | 4篇 |
预防医学 | 3303篇 |
眼科学 | 1087篇 |
药学 | 4629篇 |
61篇 | |
中国医学 | 3568篇 |
肿瘤学 | 2973篇 |
出版年
2024年 | 47篇 |
2023年 | 692篇 |
2022年 | 1355篇 |
2021年 | 2017篇 |
2020年 | 2116篇 |
2019年 | 2158篇 |
2018年 | 1204篇 |
2017年 | 1410篇 |
2016年 | 1077篇 |
2015年 | 1860篇 |
2014年 | 2542篇 |
2013年 | 2416篇 |
2012年 | 3286篇 |
2011年 | 3670篇 |
2010年 | 2789篇 |
2009年 | 2336篇 |
2008年 | 2617篇 |
2007年 | 2471篇 |
2006年 | 2231篇 |
2005年 | 1947篇 |
2004年 | 1512篇 |
2003年 | 1467篇 |
2002年 | 1240篇 |
2001年 | 1000篇 |
2000年 | 795篇 |
1999年 | 671篇 |
1998年 | 397篇 |
1997年 | 473篇 |
1996年 | 304篇 |
1995年 | 301篇 |
1994年 | 244篇 |
1993年 | 187篇 |
1992年 | 141篇 |
1991年 | 118篇 |
1990年 | 102篇 |
1989年 | 109篇 |
1988年 | 88篇 |
1987年 | 95篇 |
1986年 | 59篇 |
1985年 | 55篇 |
1984年 | 19篇 |
1983年 | 18篇 |
1982年 | 11篇 |
1981年 | 17篇 |
1980年 | 15篇 |
1979年 | 3篇 |
1978年 | 7篇 |
1977年 | 5篇 |
1976年 | 2篇 |
1975年 | 5篇 |
排序方式: 共有10000条查询结果,搜索用时 20 毫秒
1.
2.
3.
Qi Zhang Ye Zhou Lijie Song Weijia Fang Meng Qiu Yanhong Gu Yang Yang Jingdong Zhang Jing Liu Jian Li Ming Lu Tianxiao Gong Xin Wang Yan Li Jun Yang Yingjiang Ye Lin Shen 《International journal of cancer. Journal international du cancer》2023,153(11):1885-1893
Formal multidisciplinary team (MDT) discussions in clinical practice require time and space but have unclear survival benefits for advanced gastrointestinal cancer patients. Our study aimed to investigate the long-term survival of patients with advanced gastrointestinal cancer after MDT decision. From June 2017 to June 2019, continuous MDT discussions on advanced gastrointestinal cancer were conducted in 13 medical centers in China. MDT decisions and actual treatment received by patients were prospectively recorded. The primary endpoint was the difference in overall survival (OS) between patients in the MDT decision implementation and nonimplementation groups. The secondary endpoints included the implementation rate of MDT decisions and subgroup survival analysis. A total of 461 MDT decisions of 455 patients were included in our study. The implementation rate of MDT decisions was 85.7%. Previous treatment had an impact on MDT decision-making. The OS was 24.0 months and 17.0 months in the implementation and nonimplementation groups, respectively. The implementation of MDT decisions significantly reduced the risk of death in multivariate analyses (hazard ratio = 0.518; 95% confidence interval: 0.304-0.884, P = .016). Subgroup analysis showed a significant difference in survival of patients with colorectal cancer, but not in survival of patients with gastric cancer. The rate of secondary MDT discussion was only 5.6% among patients who the MDT decisions were discontinued due to changes in their condition. MDT discussion can prolong the OS of patients with advanced gastrointestinal cancer, especially those with colorectal cancer. Timely scheduling of the subsequent MDT discussion is necessary when the disease condition changes. 相似文献
4.
Lei Qi Mingxing Wang Yuehui Jia Yuanyuan Wang Liangfang Xue Linlin Du Shuxiu Hao Shengqi Su Ruixiang Wang Huixin Sun Chen Feng Guijin Li Qingyu Zeng Cunqi Lv Jiacheng Li Qi Li Yunyan Zhang Tong Wang 《International journal of cancer. Journal international du cancer》2023,153(6):1172-1181
Information regarding the impact of the coronavirus disease 2019 (COVID-19) pandemic on cervical cancer in mainland China is lacking. We explored its impact on the hospital attendance of patients with primary cervical cancer. We included 1918 patients with primary cervical cancer who initially attended Harbin Medical University Cancer Hospital between January 23, 2019, and January 23, 2021. Attendance decreased by 31%, from 1135 in 2019 to 783 in 2020, mainly from January to June (𝜒2 = 73.362, P < .001). The percentage of patients detected by screening decreased from 12.1% in January-June 2019 to 5.8% in January-June 2020 (𝜒2 = 7.187, P = .007). Patients with stage I accounted for 28.4% in 2020 significantly lower than 36.6% in 2019 (𝜒2 = 14.085, P < .001), and patients with stage III accounted for 27.1% in 2020 significantly higher than 20.5% in 2019 (𝜒2 = 11.145, P < .001). Waiting time for treatment was extended from 8 days (median) in January-June and July-December 2019 to 16 days in January-June (𝜒2 = 74.674, P < .001) and 12 days in July-December 2020 (𝜒2 = 37.916, P < .001). Of the 179 patients who delayed treatment, 164 (91.6%) were for the reasons of the healthcare providers. Compared to 2019, the number of patients in Harbin or non-Harbin in Heilongjiang Province and outside the province decreased, and cross-regional medical treatment has been hindered. The COVID-19 pandemic has negatively impacted cervical cancer patient attendance at the initial phase. These results are solid evidence that a strategy and mechanism for the effective attendance of cervical cancer patients in response to public health emergencies is urgently needed. 相似文献
5.
6.
7.
8.
感染性疾病对老年人危害严重,接种疫苗是预防感染的有效手段。但我国常见感染性疾病疫苗的整体接种率偏低,基层医务人员及居民对疫苗接种的认知存在不足。《社区老年人常见感染性疾病疫苗应用专家共识》针对流感疫苗、肺炎球菌疫苗和带状疱疹疫苗3种常见疫苗的接种给予了详细的指导,旨在提高基层医务人员对老年人群疫苗接种的重视程度,加强其对公众的疫苗接种宣传教育,医防协同,共同助力提高老年人群健康水平。 相似文献
9.
目的 研究深圳市气象因素对5岁以下儿童轮状病毒(RV)腹泻的非线性和滞后效应.方法 对深圳市2014~2016年气象因素和RV腹泻进行相关性分析,控制其他气象因素和长期趋势等混杂因素后,采用分布滞后非线性模型分别探讨气温和相对湿度对RV腹泻的影响.结果 低温是RV腹泻的危险因素,当气温在P5(13.4℃)和P25(19℃)时滞后效应在第11天达到最大.RR值分别为1.118(95%CI:1.096~ 1.139)和1.076(95%CI:1.063~1.090),21 d的累积效应值为6.828(95%CI:5.059~9.215)和3.244(95%CI:2.641~3.985).在P75(28.2℃)、P95(30.1℃)效应无统计学意义.RV腹泻对相对湿度的变化表现较为迅速,显示出明显的负相关作用.在P5(52.75%)相对湿度时,滞后2~16d时都表现出危险效应,滞后4d时有最大的效应,RR值为1.063(95%CI:1.040~ 1.085),21 d累积RR为1.565 (95%CI:1.205~2.032).相对湿度为P75(83%)和P95(91%)时,对RV腹泻有显著性的保护作用,累积RR值分别为0.720(95%CI:0.663~ 0.782)和0.283 (95% CI:0.224~0.358).结论 气温和相对湿度对RV腹泻的影响呈明显的非线性、滞后性.低温是RV腹泻的危险因素;相对湿度与RV病例数有明显的负相关关系,建议在低温低湿季节对5岁以下儿童加强健康教育,及时采取防护措施来预防该疾病的流行. 相似文献
10.