全文获取类型
收费全文 | 74665篇 |
免费 | 44255篇 |
国内免费 | 21篇 |
专业分类
耳鼻咽喉 | 1530篇 |
儿科学 | 4284篇 |
妇产科学 | 619篇 |
基础医学 | 15553篇 |
口腔科学 | 5126篇 |
临床医学 | 12391篇 |
内科学 | 23049篇 |
皮肤病学 | 7509篇 |
神经病学 | 13175篇 |
特种医学 | 2297篇 |
外国民族医学 | 5篇 |
外科学 | 13884篇 |
综合类 | 82篇 |
一般理论 | 22篇 |
预防医学 | 4235篇 |
眼科学 | 1279篇 |
药学 | 5768篇 |
中国医学 | 1037篇 |
肿瘤学 | 7096篇 |
出版年
2023年 | 74篇 |
2022年 | 183篇 |
2021年 | 1462篇 |
2020年 | 5139篇 |
2019年 | 10907篇 |
2018年 | 10237篇 |
2017年 | 11531篇 |
2016年 | 12171篇 |
2015年 | 11984篇 |
2014年 | 11873篇 |
2013年 | 12410篇 |
2012年 | 4161篇 |
2011年 | 4062篇 |
2010年 | 8936篇 |
2009年 | 5271篇 |
2008年 | 1998篇 |
2007年 | 834篇 |
2006年 | 885篇 |
2005年 | 664篇 |
2004年 | 654篇 |
2003年 | 645篇 |
2002年 | 746篇 |
2001年 | 770篇 |
2000年 | 694篇 |
1999年 | 266篇 |
1998年 | 25篇 |
1997年 | 23篇 |
1996年 | 25篇 |
1995年 | 19篇 |
1994年 | 18篇 |
1993年 | 12篇 |
1992年 | 22篇 |
1991年 | 33篇 |
1990年 | 28篇 |
1989年 | 18篇 |
1988年 | 20篇 |
1987年 | 16篇 |
1986年 | 12篇 |
1985年 | 9篇 |
1984年 | 10篇 |
1983年 | 7篇 |
1982年 | 6篇 |
1981年 | 8篇 |
1980年 | 8篇 |
1979年 | 9篇 |
1974年 | 5篇 |
1973年 | 5篇 |
1971年 | 5篇 |
1967年 | 4篇 |
1966年 | 4篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Fathi A Elshazly Walid K Abdelbasset Ragab K Elnaggar Sayed A Tantawy 《African health sciences》2020,20(1):368
BackgroundSecond-hand smoking or environmental tobacco smoke is a critical health risk. Children are the most vulnerable to second-hand smoking because of their small bronchial ducts, less developed immunity, and low-physical activity.ObjectivesThe purpose of this study was to ascertain the effects of second-hand smoking on lung functions in athlete and non-athlete school-aged children.MethodsThis observational study included forty-six school-aged children, their age was 8–15 years, assigned to three groups; 2 study groups and 1 control group (n=15). The study groups comprised of 16 football players, and of 15 cyclists. Lung functions were evaluated recording forced vital capacity, forced expiratory volume in 1 sec and peak expiratory flow using digital spirometer.ResultsAll measures were recorded in definite values and the children were also classified into second-hand smoking (SH), or non-exposed to tobacco smoking (NE). The findings presented a significant increase (p<0.05) of the study groups in forced vital capacity, forced expiratory volume in 1 sec and peak expiratory flow solely for the non-exposed children. However, there were non-significant differences between the cyclists and football players or between the passive smoking children and non-exposed children in any of the two study groups (p>0.05).ConclusionThe outcomes of this study suggest beneficial influences of the sports activity on the lung functions, without different influences of the cyclists and football players on the lung functions. 相似文献
32.
33.
34.
35.
36.
Sophocarpine attenuates toll‐like receptor 4 in steatotic hepatocytes to suppress pro‐inflammatory cytokines synthesis
下载免费PDF全文
![点击此处可从《Journal of gastroenterology and hepatology》网站下载免费的PDF全文](/ch/ext_images/free.gif)
37.
38.
Kun‐Yong Sung Seungkoo Lee Yeonjin Jeong Sang‐Yeul Lee 《The Australasian journal of dermatology》2021,62(1):60-63
A classic pilomatricoma, which usually presents with an asymptomatic, solitary, firm, subcutaneous nodule in the head, neck, or extremities of the paediatric population, is easily diagnosed based on its characteristic clinical and histopathological features. However, its variants often pose particular diagnostic challenges to clinicians due to their rarity and diverse clinicopathological features. We present a new pseudocystic variant, manifesting as solid lesions floating in a fluid‐filled sac. 相似文献
39.
40.
Peng‐fei Lei Shi‐long Su Ling‐yu Kong Cheng‐gong Wang Da Zhong Yi‐he Hu 《Orthopaedic Surgery》2019,11(5):914-920
Three‐dimensional (3D) printing technology, virtual reality, and augmented reality technology have been used to help surgeons to complete complex total hip arthroplasty, while their respective shortcomings limit their further application. With the development of technology, mixed reality (MR) technology has been applied to improve the success rate of complicated hip arthroplasty because of its unique advantages. We presented a case of a 59‐year‐old man with an intertrochanteric fracture in the left femur, who had received a prior left hip fusion. After admission to our hospital, a left total hip arthroplasty was performed on the patient using a combination of MR technology and 3D printing technology. Before surgery, 3D reconstruction of a certain bony landmark exposed in the surgical area was first performed. Then a veneer part was designed according to the bony landmark and connected to a reference registration landmark outside the body through a connecting rod. After that, the series of parts were made into a holistic reference registration instrument using 3D printing technology, and the patient's data for bone and surrounding tissue, along with digital 3D information of the reference registration instrument, were imported into the head‐mounted display (HMD). During the operation, the disinfected reference registration instrument was installed on the selected bony landmark, and then the automatic real‐time registration was realized by HMD through recognizing the registration landmark on the reference registration instrument, whereby the patient's virtual bone and other anatomical structures were quickly and accurately superimposed on the real body of the patient. To the best of our knowledge, this is the first report to use MR combined with 3D printing technology in total hip arthroplasty. 相似文献