全文获取类型
收费全文 | 230075篇 |
免费 | 19997篇 |
国内免费 | 12139篇 |
专业分类
耳鼻咽喉 | 2151篇 |
儿科学 | 3601篇 |
妇产科学 | 3836篇 |
基础医学 | 23750篇 |
口腔科学 | 4450篇 |
临床医学 | 28877篇 |
内科学 | 33106篇 |
皮肤病学 | 3139篇 |
神经病学 | 10748篇 |
特种医学 | 8157篇 |
外国民族医学 | 65篇 |
外科学 | 22122篇 |
综合类 | 39928篇 |
现状与发展 | 42篇 |
一般理论 | 24篇 |
预防医学 | 18568篇 |
眼科学 | 5681篇 |
药学 | 24446篇 |
195篇 | |
中国医学 | 12532篇 |
肿瘤学 | 16793篇 |
出版年
2024年 | 467篇 |
2023年 | 2340篇 |
2022年 | 5620篇 |
2021年 | 8629篇 |
2020年 | 6507篇 |
2019年 | 5764篇 |
2018年 | 6197篇 |
2017年 | 6168篇 |
2016年 | 5781篇 |
2015年 | 9219篇 |
2014年 | 11995篇 |
2013年 | 12749篇 |
2012年 | 18575篇 |
2011年 | 19869篇 |
2010年 | 14552篇 |
2009年 | 12335篇 |
2008年 | 14944篇 |
2007年 | 14860篇 |
2006年 | 13948篇 |
2005年 | 12581篇 |
2004年 | 9490篇 |
2003年 | 9172篇 |
2002年 | 7396篇 |
2001年 | 6091篇 |
2000年 | 5186篇 |
1999年 | 4166篇 |
1998年 | 2151篇 |
1997年 | 2108篇 |
1996年 | 1587篇 |
1995年 | 1470篇 |
1994年 | 1323篇 |
1993年 | 800篇 |
1992年 | 1214篇 |
1991年 | 1079篇 |
1990年 | 917篇 |
1989年 | 774篇 |
1988年 | 690篇 |
1987年 | 592篇 |
1986年 | 470篇 |
1985年 | 402篇 |
1984年 | 252篇 |
1983年 | 220篇 |
1982年 | 132篇 |
1981年 | 123篇 |
1979年 | 177篇 |
1978年 | 145篇 |
1977年 | 94篇 |
1974年 | 107篇 |
1973年 | 98篇 |
1972年 | 95篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
92.
93.
Ming-Yeh Yang Ching-Yuan Huang Tina H.T. Chiu Kai-Chih Chang Ming-Nan Lin Liang-Yü Chen Anren Hu 《Yao wu shi pin fen xi = Journal of food and drug analysis.》2019,27(2):494-501
Vitamin D is responsible for multiple metabolic functions in humans. Rickets are the most common disease caused by vitamin D deficiency. It is caused by poor calcium intake resulting in poor serum-ionized calcium. The purpose of this study is to develop a rapid, sensitive, and feasible method to determine the 25-hydroxy-vitamin D3 (25(OH)D3) levels in blood samples for clinical assessment. In this study, gas chromatography coupled mass spectrometry with trimethylsilyl derivatization (TMS-GC-MS) is the most suitable protocol for quantitative analyses of 25(OH)D3. Performance of method was evaluated and compared with liquid chromatography and immunoassay. Method validation has been carried out with plasma specimens. The limit of quantitation of TMS-GC-MS method is 1.5 ppb with good linear correlation. Furthermore, the dietary intake and nutritional status of vegetarian and non-vegetarians in Taiwan were assessed by our validated method. As a result, this vitamin D nutrition survey demonstrates that most Taiwanese people have insufficient vitamin D. Due to dietary habits; the male vegans may have the highest risk of vitamin D deficiency. 相似文献
94.
95.
WT1基因位于人类染色体11p13,在80%的急性髓系白血病(acute myeloid leukemia,AML)患者中高表达,是AML预后不良的分子标志,可作为AML预后评估和微小残留病变(minimal residual disease,MRD)监测的有效指标。由于WT1在AML中均有异常高表达,故认为是一种AML抗原,可作为特异性免疫治疗的新靶点。一些小规模的临床试验证实以WT1为靶点的免疫治疗是有效的、安全的,这些免疫治疗可作为那些有高危复发风险及初始标准化疗失败的AML患者的辅助治疗。本文就近几年WT1与AML的预后及有关以WT1为靶点的主动特异性免疫治疗的研究进展予以综述。 相似文献
96.
97.
Three‐Dimensional Echocardiographic Evaluation of Mitral Apparatus during Preload Manipulation in Patients with Hypertrophic Cardiomyopathy
下载免费PDF全文
![点击此处可从《Echocardiography (Mount Kisco, N.Y.)》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Hyemoon Chung M.D. Ji Hyun Yoon M.D. Young Won Yoon M.D. Ph.D. Ji Young Chung B.N. Jung‐Joon Cha M.D. Jong‐Youn Kim M.D. Ph.D. Pil‐Ki Min M.D. Ph.D. Byoung‐Kwon Lee M.D. Ph.D. Bum‐Kee Hong M.D. Ph.D. Se‐Joong Rim M.D. Ph.D. Hyuck Moon Kwon M.D. Eui‐Young Choi M.D. Ph.D. 《Echocardiography (Mount Kisco, N.Y.)》2015,32(8):1261-1269
98.
99.
通过文献研究、问卷调查、专家访谈、现地调研等方法,分析医院离退休干部参与社会治理的现状及影响因素,探讨社区对离退休干部参与社会治理的需求,提出通过党建引领医院离退休干部参与社会治理的“1235”模式,并给出具体的操作路径,以期为推动医院离退休干部积极参与社会治理提供参考。 相似文献
100.
Objective To analyze the early mortality and related risk factors of new hemodialysis patients in Zhejiang province, and provide basis for reducing the death risk of hemodialysis patients. Methods The early mortality and related factors of new hemodialysis patients from January 1, 2010 to June 30, 2018 were retrospectively analyzed using the database of Zhejiang province hemodialysis registration. The early mortality was defined as death within 90 days of dialysis. Cox regression model was used to analyze the related risk factors of the early mortality in hemodialysis patients. Results The mortality was the highest in the first month after dialysis (46.40/100 person year), and gradually stabilized after three months. The early mortality was 25.33/100 person year. The mortality within 120 days and 360 days were 21.40/100 person year and 11.37/100 person year, respectively. The elderly (≥65 years old, HR=1.981, 95%CI 1.319-2.977, P<0.001), primary tumor (HR=3.308, 95%CI 1.137-5.624, P=0.028), combined with tumors (not including the primary tumor, HR=2.327, 95%CI 1.200-4.513, P=0.012), temporary catheter (the initial dialysis pathway, HR=3.632, 95%CI 1.806-7.307, P<0.001), lower albumin (<30 g/L, HR=2.181, 95%CI 1.459-3.260, P<0.001), lower hemoglobin (every 0.01 g/L increase, HR=0.861, 95%CI 0.793-0.935, P=0.001), lower high density lipoprotein (<0.7 mmol/L, HR=1.796, 95%CI 1.068-3.019, P=0.027) and higher C reactive protein (≥40 mg/L, HR=1.889, 95%CI 1.185-3.012, P=0.008) were the risk factors of early death for hemodialysis patients. Conclusions The early mortality of hemodialysis patients is high after dialysis, and gradually stable after 3 months. The elderly, primary tumor, combined with tumors, the initial dialysis pathway, lower albumin, lower hemoglobin, lower high density lipoprotein and higher C reactive protein are the risk factors of early death for hemodialysis patients. 相似文献