全文获取类型
收费全文 | 5634篇 |
免费 | 410篇 |
国内免费 | 7篇 |
专业分类
耳鼻咽喉 | 104篇 |
儿科学 | 250篇 |
妇产科学 | 67篇 |
基础医学 | 629篇 |
口腔科学 | 196篇 |
临床医学 | 562篇 |
内科学 | 1067篇 |
皮肤病学 | 53篇 |
神经病学 | 460篇 |
特种医学 | 94篇 |
外科学 | 782篇 |
综合类 | 134篇 |
一般理论 | 3篇 |
预防医学 | 570篇 |
眼科学 | 257篇 |
药学 | 486篇 |
中国医学 | 22篇 |
肿瘤学 | 315篇 |
出版年
2023年 | 40篇 |
2022年 | 61篇 |
2021年 | 168篇 |
2020年 | 83篇 |
2019年 | 115篇 |
2018年 | 151篇 |
2017年 | 93篇 |
2016年 | 111篇 |
2015年 | 124篇 |
2014年 | 172篇 |
2013年 | 247篇 |
2012年 | 388篇 |
2011年 | 395篇 |
2010年 | 186篇 |
2009年 | 197篇 |
2008年 | 284篇 |
2007年 | 236篇 |
2006年 | 273篇 |
2005年 | 273篇 |
2004年 | 258篇 |
2003年 | 183篇 |
2002年 | 213篇 |
2001年 | 158篇 |
2000年 | 145篇 |
1999年 | 116篇 |
1998年 | 50篇 |
1997年 | 40篇 |
1996年 | 30篇 |
1995年 | 25篇 |
1993年 | 26篇 |
1992年 | 80篇 |
1991年 | 91篇 |
1990年 | 95篇 |
1989年 | 78篇 |
1988年 | 78篇 |
1987年 | 68篇 |
1986年 | 60篇 |
1985年 | 64篇 |
1984年 | 41篇 |
1983年 | 33篇 |
1981年 | 22篇 |
1980年 | 22篇 |
1979年 | 49篇 |
1978年 | 45篇 |
1977年 | 25篇 |
1975年 | 27篇 |
1974年 | 33篇 |
1973年 | 31篇 |
1972年 | 20篇 |
1971年 | 33篇 |
排序方式: 共有6051条查询结果,搜索用时 500 毫秒
1.
2.
3.
4.
5.
We examined several possible causes for the high incidence of poor sensory acuity in the limbs of 176 patients with moderate to severe peripheral vascular insufficiency. We investigated the relationships of diabetes, alcoholism, and smoking, as well as the severity of peripheral vascular disease, to the integrity of basic sensory modalities such as two-point discrimination and perception of light touch. The presence or absence of diabetes exerted the strongest effect on peripheral sensation. In patients who did not have diabetes, sensation in the limbs was most strongly affected by whether the patient was an alcoholic. Smoking did not have a significant effect on limb sensation. Among nondiabetic, nonalcoholic patients, there was a weak residual effect related to the severity of the peripheral vascular insufficiency. Even among these patients, however, systemic factors predominated in determining the loss of sensation. We also examined the extent to which loss of sensation might be related to the development of ulcers. Among patients who were not diabetic, there was a highly significant relationship between loss of sensation and the presence of limb ulceration. Surprisingly, however, there was no discernable relationship between the presence of ulcers in diabetic patients and the degree of loss of peripheral sensation. This result suggests that a large percentage of ulcers seen in diabetic patients are not of neurogenic origin. 相似文献
6.
Osteochondral Fracture of the Fourth Metatarsal Head Treated by Open Reduction and Internal Fixation
Praveen K.R. Mereddy MBBS MSOrth DNB Orth MRCSEd Andrew Molloy MBchB MRCS FRCS Michael S. Hennessy BSc MBchB FRCSEd 《The Journal of foot and ankle surgery》2007,46(4):320-322
Fracture of the metatarsal head is uncommon, and reports of isolated osteochondral fracture of the metatarsal head are rare. Because of the distal location of the fracture, it is difficult to achieve and maintain reduction, and potential complications include avascular necrosis and subchondral fatigue fracture. The authors present a case of an osteochondral fracture in a 40-year-old man, which was treated by open reduction and internal fixation with a single twist-off screw, with good results 12 months postoperatively. 相似文献
7.
8.
M F Matangi J A Strickland J J Burgess E F Busse 《The Canadian journal of cardiology》1987,3(7):342-344
Operative mortality, postoperative morbidity and follow up data were analyzed retrospectively from 122 consecutive patients, over 65 years old undergoing elective aortocoronary bypass grafting for symptomatic relief of angina pectoris at the Plains Health Centre, Regina, Saskatchewan, from January 1980 to December 1985. There were two in-hospital deaths (operative mortality 1.6%). Definite perioperative myocardial infarction occurred in 12 patients (9.8%). The 120 survivors were followed for a mean of 32 months. There were three deaths during follow-up, giving a five-year probability of survival of 93%. Twenty-three clinical events (including deaths) occurred during follow-up, giving a five-year probability of event free survival of 72%. Ninety percent of patients say they are pleased with their operation. Seventy-eight percent are currently angina free. These data illustrate the effectiveness of aortocoronary bypass grafting in low risk elderly patients with symptomatic coronary artery disease. 相似文献
9.
Abhay R Vasavada Mamidipudi R Praveen Sheena A Dholakia Rupal H Trivedi 《Journal of AAPOS》2007,11(2):192-194
We present two children discovered to have a total cataract in one eye with a posterior subcapsular cataract in the other eye. Sequential photography documented rapid progression of the posterior subcapsular cataract to a preexisting posterior capsule defect and subsequently to a white, mature cataract. We propose that early intervention be considered in cases with any posterior subcapsular changes (no matter how subtle) and history of total cataract in the fellow eye, especially in any situation where loss of follow-up is likely to occur. In the event surgery is not advised, parents should be warned about possible cataract progression and the importance of regular follow-up examinations. 相似文献
10.