全文获取类型
收费全文 | 62421篇 |
免费 | 4602篇 |
国内免费 | 226篇 |
专业分类
耳鼻咽喉 | 706篇 |
儿科学 | 1814篇 |
妇产科学 | 1225篇 |
基础医学 | 8061篇 |
口腔科学 | 1041篇 |
临床医学 | 6049篇 |
内科学 | 12881篇 |
皮肤病学 | 763篇 |
神经病学 | 5858篇 |
特种医学 | 2083篇 |
外国民族医学 | 4篇 |
外科学 | 10260篇 |
综合类 | 952篇 |
现状与发展 | 1篇 |
一般理论 | 71篇 |
预防医学 | 5629篇 |
眼科学 | 1267篇 |
药学 | 3909篇 |
中国医学 | 78篇 |
肿瘤学 | 4597篇 |
出版年
2023年 | 233篇 |
2022年 | 444篇 |
2021年 | 1054篇 |
2020年 | 604篇 |
2019年 | 1019篇 |
2018年 | 1258篇 |
2017年 | 858篇 |
2016年 | 938篇 |
2015年 | 1077篇 |
2014年 | 1736篇 |
2013年 | 2581篇 |
2012年 | 3801篇 |
2011年 | 4114篇 |
2010年 | 2302篇 |
2009年 | 2107篇 |
2008年 | 3696篇 |
2007年 | 3867篇 |
2006年 | 3850篇 |
2005年 | 3957篇 |
2004年 | 3893篇 |
2003年 | 3545篇 |
2002年 | 3479篇 |
2001年 | 648篇 |
2000年 | 522篇 |
1999年 | 721篇 |
1998年 | 824篇 |
1997年 | 683篇 |
1996年 | 638篇 |
1995年 | 581篇 |
1994年 | 532篇 |
1993年 | 477篇 |
1992年 | 484篇 |
1991年 | 478篇 |
1990年 | 401篇 |
1989年 | 413篇 |
1988年 | 398篇 |
1987年 | 369篇 |
1986年 | 347篇 |
1985年 | 379篇 |
1984年 | 525篇 |
1983年 | 442篇 |
1982年 | 556篇 |
1981年 | 534篇 |
1980年 | 529篇 |
1979年 | 301篇 |
1978年 | 337篇 |
1977年 | 314篇 |
1976年 | 259篇 |
1975年 | 247篇 |
1974年 | 272篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
81.
Andrew R. Hoellein MD Christopher A. Feddock MD Charles H. Griffith III MD MSPH John F. Wilson PhD Donald R. Barnett MD MSPH Pat F. Bass III MD MS T. Shawn Caudill MD MSPH 《Journal of general internal medicine》2004,19(5P2):562-565
Due to recent public debate and newly imposed resident work hour restrictions, we decided to investigate the relationship of resident call status to their ambulatory patients' satisfaction. Resident continuity clinic patients were asked to rate their level of satisfaction on a 10-point Likert-type scale. Using multiple regression approaches, these data were then assessed as a function of resident call status. We found that in 646 patient encounters, patient satisfaction scores were significantly less when the resident was postcall, 8.99 ± 1.8, than when not postcall, 9.31 ± 1.3. We herein discuss etiologies and implications of these findings for both patient care and medical education. 相似文献
82.
83.
Charles H Spencer 《Pediatric rheumatology online journal》2007,5(1):21-3
Some pediatric rheumatologists in the West may take for granted that pediatric rheumatology (PR) is a recognized subspecialty.
Yet pediatric rheumatology has been accepted as a subspecialty in the United States only since 1990. There are still countries
where many pediatric subspecialties are not given official recognition and support, including PR. This lack of recognition
delays and impedes the development of PR, appropriate musculoskeletal and rheumatic teaching in medical schools, and optimal
diagnosis and treatment for children with these illnesses. In the opinion of editorial staff, each country where pediatric
rheumatology is reasonably well developed as a subspecialty has an obligation to help our pediatric rheumatologists elsewhere
gain recognition, support, and respect. The Pediatric Rheumatology European Society (PReS) and the Pediatric Rheumatology
International Trial Organization (PRINTO) have been leaders in this effort, but in many countries, pediatric rheumatology
is still not recognized. This editorial offers rationales and justifications for medical and governmental entities accrediting
pediatric rheumatology as a separate subspecialty that may aid in these efforts. 相似文献
84.
Charles Kennedy 《The Neuroscientist》2005,11(4):345-356
The ability of adenosine 5'-triphosphate (ATP) to evoke acute pain has been known for many years, but its role in nociceptive signaling is only now becoming clear. ATP acts via P2X and P2Y receptors, and of particular importance here is the P2X(3) receptor. It is expressed selectively at high levels in nociceptive sensory neurons, where it forms functional receptors on its own and in combination with the P2X(2) receptor. Recent reports using gene knockout methods; antisense oligonucleotide and small, interfering RNA technologies; and a novel, selective P2X(3) antagonist, A-317491, show that P2X(3) receptors are involved in chronic inflammatory and neuropathic pain. The mRNA for other P2X subunits is also found in sensory neurons, and there is evidence for functional P2X(1/5) or P2X(2/6) heteromers in some of these. These data support the possibility that P2X receptors, particularly the P2X(3) subtype, could be targeted in the search for new, effective analgesics. 相似文献
85.
86.
T Matthew Shields Charles H Hennekens 《Endocrinology & Metabolism Clinics of North America》2004,33(3):577-93, vii
Cardiovascular disease (CVD), which includes myocardial infarction(MI), stroke, and peripheral vascular disease, remains the leading cause of death in the United States and in most developed countries. In the United States today, 25% of patients have metabolic syndrome-including those who have had a prior occlusive vascular disease event, those who are having an acute MI or ischemic stroke, and finally, the largest segment of the population,namely those who have not yet experienced a clinical CVD, but whose risks are substantial (10-year risk 10%). This article reviews the totality of evidence for aspirin in the treatment and prevention of CVD and emphasizes its importance as adjunctive therapy for patients with metabolic syndrome. 相似文献
87.
88.
89.
Our previous work on a social insect model of ethanol-induced behavior focused on behavioral studies of honeybees (Apis mellifera L.). We now investigate the dependence of honeybee blood ethanol concentration on both the amount of ethanol consumed and time elapsed since ingestion. Blood ethanol level was determined using gas chromatograph using hemolymph taken from harnessed bees. Significantly increased levels of ethanol in honeybee hemolymph were detected within 15 min of feeding bees alcohol. Within 30 min, ethanol concentration increased 2.7 times. The concentration of ethanol ingested also had a significant effect on blood ethanol level. However, postfeeding times greater than 30 min did not significantly increase ethanol concentration in bee hemolymph. This study integrates with our behavioral data on the effect of ethanol on honeybees. Our laboratory and field experiments show a correlation between the time frame for behavioral changes and significant increases of blood ethanol levels shown in this study. 相似文献