全文获取类型
收费全文 | 1096061篇 |
免费 | 94737篇 |
国内免费 | 21230篇 |
专业分类
耳鼻咽喉 | 14739篇 |
儿科学 | 26757篇 |
妇产科学 | 27937篇 |
基础医学 | 151139篇 |
口腔科学 | 29426篇 |
临床医学 | 109504篇 |
内科学 | 195677篇 |
皮肤病学 | 19083篇 |
神经病学 | 83256篇 |
特种医学 | 44284篇 |
外国民族医学 | 369篇 |
外科学 | 158228篇 |
综合类 | 67423篇 |
一般理论 | 289篇 |
预防医学 | 80881篇 |
眼科学 | 28327篇 |
药学 | 91336篇 |
221篇 | |
中国医学 | 17021篇 |
肿瘤学 | 66131篇 |
出版年
2021年 | 15472篇 |
2020年 | 13709篇 |
2019年 | 13852篇 |
2018年 | 15598篇 |
2017年 | 13881篇 |
2016年 | 13146篇 |
2015年 | 18793篇 |
2014年 | 25439篇 |
2013年 | 28624篇 |
2012年 | 40359篇 |
2011年 | 44091篇 |
2010年 | 26583篇 |
2009年 | 22850篇 |
2008年 | 35392篇 |
2007年 | 37423篇 |
2006年 | 37628篇 |
2005年 | 37594篇 |
2004年 | 31619篇 |
2003年 | 30145篇 |
2002年 | 28011篇 |
2001年 | 40889篇 |
2000年 | 42256篇 |
1999年 | 37331篇 |
1998年 | 13139篇 |
1997年 | 12448篇 |
1996年 | 11326篇 |
1995年 | 11386篇 |
1994年 | 10486篇 |
1993年 | 9094篇 |
1992年 | 28659篇 |
1991年 | 27791篇 |
1990年 | 27061篇 |
1989年 | 25875篇 |
1988年 | 24199篇 |
1987年 | 23683篇 |
1986年 | 22363篇 |
1985年 | 21620篇 |
1984年 | 16644篇 |
1983年 | 14119篇 |
1979年 | 16769篇 |
1978年 | 12073篇 |
1977年 | 10136篇 |
1976年 | 9291篇 |
1975年 | 10108篇 |
1974年 | 12614篇 |
1973年 | 12117篇 |
1972年 | 11523篇 |
1971年 | 10668篇 |
1970年 | 10194篇 |
1969年 | 9894篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
目的分析江苏省启东市1972—2016年胃癌死亡流行特征。方法收集启东市1972—2016年恶性肿瘤死亡登记数据库及历年人口资料, 计算死亡率、中国人口标化率(中标率)、世界人口标化率(世标率)、35~64岁截缩率、0~74岁累积死亡率、累积死亡风险、变化百分比、死亡率年均变化百分比。结果 1972—2016年启东市胃癌死亡例数为15 863例, 占全部恶性肿瘤死亡例数的16.04%, 胃癌死亡率为31.37/10万, 中标率为12.97/10万, 世标率为21.39/10万, 35~64岁截缩死亡率为28.86/10万, 0~74岁累积死亡率为2.54%, 胃癌死亡累积风险为2.51%。男性死亡10 114例, 男性死亡率、中标率、世标率分别为40.53/10万、17.98/10万和30.13/10万;女性死亡5 749例, 女性死亡率、中标率、世标率分别为22.45/10万、8.52/10万和13.92/10万。25岁以下各年龄组的死亡率<1/10万, 死亡率随年龄的增长而升高, 50~岁组达到并超过人群的平均死亡率水平, 80~岁组达到死亡高峰。1972—2016年间胃癌死... 相似文献
5.
6.
7.
8.
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
9.
目的 了解芦山地震5年后雅安市高血压患者心理卫生问题检出率及其影响因素,为促进地震灾区高血压患者心理健康提供参考。方法 采用分层整群随机抽样方法,于2018年12月选取雅安市高血压患者800例作为研究对象。采用自编居民基本信息调查表收集患者的基本资料,采用12项一般健康问卷(GHQ-12)评定患者近期是否存在心理卫生问题,采用Logistic回归分析其影响因素。结果 回收有效问卷744份(93.00%),检出存在心理卫生问题者79例(10.62%)。单因素分析结果显示,不同婚姻状况(P?0.01)、家庭人均月收入(P=0.012)、是否接受社会救助(χ2=25.194,P?0.01)的高血压患者心理卫生问题检出率差异均有统计学意义。Logistic回归分析显示,未婚/分居/离异/丧偶(OR=3.879,P=0.015)以及接受社会救助(OR=4.705,P?0.01)是高血压患者存在心理卫生问题的危险因素。结论 雅安市高血压患者心理卫生问题检出率较低,未婚/分居/离异/丧偶者以及接受社会救助的高血压患者心理卫生问题可能更突出。 相似文献
10.
S. M. White C. L. Shelton A. W. Gelb C. Lawson F. McGain J. Muret J. D. Sherman representing the World Federation of Societies of Anaesthesiologists Global Working Group on Environmental Sustainability in Anaesthesia 《Anaesthesia》2022,77(2):201-212
The Earth’s mean surface temperature is already approximately 1.1°C higher than pre-industrial levels. Exceeding a mean 1.5°C rise by 2050 will make global adaptation to the consequences of climate change less possible. To protect public health, anaesthesia providers need to reduce the contribution their practice makes to global warming. We convened a Working Group of 45 anaesthesia providers with a recognised interest in sustainability, and used a three-stage modified Delphi consensus process to agree on principles of environmentally sustainable anaesthesia that are achievable worldwide. The Working Group agreed on the following three important underlying statements: patient safety should not be compromised by sustainable anaesthetic practices; high-, middle- and low-income countries should support each other appropriately in delivering sustainable healthcare (including anaesthesia); and healthcare systems should be mandated to reduce their contribution to global warming. We set out seven fundamental principles to guide anaesthesia providers in the move to environmentally sustainable practice, including: choice of medications and equipment; minimising waste and overuse of resources; and addressing environmental sustainability in anaesthetists’ education, research, quality improvement and local healthcare leadership activities. These changes are achievable with minimal material resource and financial investment, and should undergo re-evaluation and updates as better evidence is published. This paper discusses each principle individually, and directs readers towards further important references. 相似文献