全文获取类型
收费全文 | 312783篇 |
免费 | 40489篇 |
国内免费 | 3919篇 |
专业分类
耳鼻咽喉 | 7199篇 |
儿科学 | 8331篇 |
妇产科学 | 6127篇 |
基础医学 | 27553篇 |
口腔科学 | 4911篇 |
临床医学 | 41734篇 |
内科学 | 77429篇 |
皮肤病学 | 11573篇 |
神经病学 | 26647篇 |
特种医学 | 14373篇 |
外国民族医学 | 2篇 |
外科学 | 61884篇 |
综合类 | 3417篇 |
现状与发展 | 78篇 |
一般理论 | 82篇 |
预防医学 | 16994篇 |
眼科学 | 7636篇 |
药学 | 15143篇 |
4篇 | |
中国医学 | 2037篇 |
肿瘤学 | 24037篇 |
出版年
2024年 | 770篇 |
2023年 | 5698篇 |
2022年 | 4100篇 |
2021年 | 8106篇 |
2020年 | 8461篇 |
2019年 | 5855篇 |
2018年 | 11683篇 |
2017年 | 10508篇 |
2016年 | 12364篇 |
2015年 | 13956篇 |
2014年 | 22145篇 |
2013年 | 23703篇 |
2012年 | 18174篇 |
2011年 | 17813篇 |
2010年 | 17434篇 |
2009年 | 20052篇 |
2008年 | 15078篇 |
2007年 | 13235篇 |
2006年 | 14904篇 |
2005年 | 11797篇 |
2004年 | 10243篇 |
2003年 | 8332篇 |
2002年 | 7543篇 |
2001年 | 8282篇 |
2000年 | 7094篇 |
1999年 | 6508篇 |
1998年 | 4934篇 |
1997年 | 4460篇 |
1996年 | 4305篇 |
1995年 | 4056篇 |
1994年 | 2705篇 |
1993年 | 2210篇 |
1992年 | 2947篇 |
1991年 | 2976篇 |
1990年 | 2418篇 |
1989年 | 2414篇 |
1988年 | 2169篇 |
1987年 | 1877篇 |
1986年 | 1895篇 |
1985年 | 1595篇 |
1984年 | 1190篇 |
1983年 | 1083篇 |
1982年 | 907篇 |
1981年 | 777篇 |
1980年 | 693篇 |
1979年 | 824篇 |
1978年 | 730篇 |
1977年 | 782篇 |
1974年 | 578篇 |
1972年 | 615篇 |
排序方式: 共有10000条查询结果,搜索用时 4 毫秒
81.
82.
Thomas S. Klitzner Maggie Lee Sandra Rodriguez Ruey‐Kang R. Chang 《Congenital heart disease》2006,1(3):77-88
Background. It has been reported that gender differences in cardiovascular outcomes found in adults also are present in children who undergo surgical repair for congenital heart disease. Methods. California statewide hospital discharge data 1989–99 were used to study outcomes in children <18 years undergoing cardiac surgery. Hospital discharge data were linked to death registry data to study postdischarge death within 30 days of discharge. We used logistic regression to evaluate the effect of gender on mortality controlling for age, race and ethnicity, type of insurance, household income, date and month of surgery, type of admission, hospital case volume, and various types of procedures. Results. There were 25 402 cardiac surgery cases with 1505 in‐hospital deaths (mortality rate of 5.92%). An additional 37 deaths occurred within 30 days after hospital discharge. Crude mortality rates for males (5.99%) and females (5.84%) were not significantly different. However, fewer neonates were female and females underwent a higher proportion of low‐risk procedures than males. Logistic regression revealed that females, compared with males, had a significantly higher odds ratio (OR) for in‐hospital mortality (OR = 1.18, P < .01) and overall (up to 30 days post discharge) mortality (OR = 1.18, P < .01). The risk‐adjusted length of hospital stay was similar between females and males while charges per hospital day were slightly higher in females than males. The prevalence of Down syndrome, pulmonary hypertension, and failure to thrive were higher in females. Conclusions. Female gender is associated with an 18% higher in‐hospital and 30‐day postdischarge mortality as compared with male gender. There was no difference in length of hospital stay between males and females. The mechanism by which female gender acts as a risk factor requires further investigation. 相似文献
83.
Juliette A. Loncaster MD FRCR Ernest Allan 《Photodiagnosis and Photodynamic Therapy》2006,3(2):134-137
Gorlin syndrome (naevoid basal cell carcinoma syndrome) is a genetically linked disorder characterized by the development of multiple basal cell carcinomas (BCCs) throughout life. Cumulative surgery, cryotherapy and other conventional interventions can result in significant disfigurement by middle age. Radiotherapy is contra-indicated because the mutated gene underlying the syndrome, ‘PTCH’, increases sensitivity to ionising radiation, so there is significant likelihood of inducing further tumours in and around the irradiated area. Photodynamic therapy offers a non-invasive treatment option for patients with this condition, with the added advantage of causing minimal scarring. 相似文献
84.
Nikki Lee 《Journal of human lactation》2006,22(1):11; author reply 11-11; author reply 12
85.
86.
87.
89.
Although psychoanalysis was the first-choice treatment for premature ejaculation (PE) between 1920 and 1960, hardly any reports on its efficacy have been published. Moreover, a scientific debate about its findings has never been fully developed. The recent progress that has been made in the classification of three different PE syndromes creates a new opportunity for psychoanalytic investigations of men with complaints of PE, distinguished by the actual duration of their intravaginal ejaculation latency time (IELT). The term premature-like ejaculatory dysfunction has been introduced to distinguish men with self-perceived PE at normal and long IELT durations from those men with lifelong, acquired and normal variable PE. Psychoanalytic research may contribute to a better understanding of the consequences of objective early ejaculations on the unconscious mental life of men with the four forms of PE. By integrating neurobiological, clinical and epidemiological data of ejaculatory performance, a revival of psychoanalytic research of PE in the four distinct, classified PE groups, will probably contribute to a deeper insight in to the unconscious mental life of men affected by PE. 相似文献
90.