全文获取类型
收费全文 | 1324篇 |
免费 | 163篇 |
国内免费 | 49篇 |
专业分类
耳鼻咽喉 | 9篇 |
儿科学 | 99篇 |
妇产科学 | 17篇 |
基础医学 | 150篇 |
口腔科学 | 46篇 |
临床医学 | 112篇 |
内科学 | 405篇 |
皮肤病学 | 31篇 |
神经病学 | 29篇 |
特种医学 | 189篇 |
外科学 | 70篇 |
综合类 | 108篇 |
预防医学 | 132篇 |
眼科学 | 10篇 |
药学 | 70篇 |
中国医学 | 3篇 |
肿瘤学 | 56篇 |
出版年
2024年 | 3篇 |
2023年 | 15篇 |
2022年 | 11篇 |
2021年 | 28篇 |
2020年 | 22篇 |
2019年 | 11篇 |
2018年 | 23篇 |
2017年 | 42篇 |
2016年 | 41篇 |
2015年 | 37篇 |
2014年 | 69篇 |
2013年 | 86篇 |
2012年 | 48篇 |
2011年 | 36篇 |
2010年 | 73篇 |
2009年 | 76篇 |
2008年 | 40篇 |
2007年 | 72篇 |
2006年 | 37篇 |
2005年 | 30篇 |
2004年 | 44篇 |
2003年 | 28篇 |
2002年 | 21篇 |
2001年 | 37篇 |
2000年 | 19篇 |
1999年 | 23篇 |
1998年 | 79篇 |
1997年 | 65篇 |
1996年 | 61篇 |
1995年 | 51篇 |
1994年 | 45篇 |
1993年 | 42篇 |
1992年 | 15篇 |
1991年 | 7篇 |
1990年 | 17篇 |
1989年 | 22篇 |
1988年 | 26篇 |
1987年 | 17篇 |
1986年 | 20篇 |
1985年 | 18篇 |
1984年 | 9篇 |
1983年 | 12篇 |
1982年 | 9篇 |
1981年 | 4篇 |
1980年 | 8篇 |
1979年 | 4篇 |
1978年 | 6篇 |
1977年 | 5篇 |
1976年 | 12篇 |
1975年 | 9篇 |
排序方式: 共有1536条查询结果,搜索用时 103 毫秒
1.
By injecting small amounts of CO2 through a needle, one can move bowel or bladder from the intended path of instruments during interventional procedures. The technique worked well in six of seven cases in the pelvis and retroperitoneum; it was not effective in the mediastinum or midabdomen (n = 6). 相似文献
2.
Immunity after treatment of human schistosomiasis mansoni. III. Long-term effects of treatment and retreatment 总被引:1,自引:0,他引:1
R F Sturrock R Bensted-Smith A E Butterworth P R Dalton H C Kariuki D Koech M Mugambi J H Ouma T K arap Siongok 《Transactions of the Royal Society of Tropical Medicine and Hygiene》1987,81(2):303-314
Group mean Schistosoma mansoni reinfection patterns are presented for 2 years after treatment with oxamniquine in 1981 of over 100 9- to 16-year-old Kenyan schoolchildren, and for one year after retreatment in 1983 with either oxamniquine or praziquantel when most (nearly 700) infected people in the whole community were treated. Quality control confirmed comparable Kato egg counts throughout the study. Continuing transmission after 1981 raised prevalence to nearly its original level within 6 months, but intensity remained suppressed throughout the 2 year follow-up and very few children reacquired heavy infections (greater than 400 eggs/g). Age and sex had significant effects: reinfection diminished with age, especially among boys--a pattern not apparently attributable to differential water contact. Children with heavy pretreatment infections tended to develop heavy reinfections but this trend was not statistically significant on a group basis, nor were similar trends during the period of less pronounced transmission following the 1983 community treatment. Oxamniquine was equally effective in children receiving it in both 1981 and 1983, and the efficacy of praziquantel resembled that of oxamniquine. In this area of Kenya, repeated chemotherapy will be needed to contain transmission, probably annually or biennially, unless supplemented with other, effective control measures. These findings confirm the beneficial effects of treating even a limited segment of a community at intervals of a year or more without necessarily stopping transmission. They are also compatible with recent findings on potential immune mechanisms in man. 相似文献
3.
外科医生和手术室人员经常接触手术设备产生的烟气,病人也会暴露于烟气中,特别是腹腔镜手术中产生的烟气滞留于腹腔内这一密闭空间并被吸收.这些烟气是一种与香烟烟气相似的毒性物质,然而对这种毒性物质的影响还未引起足够重视.应该采取必要措施尽可能减少手术中烟气的不良影响. 相似文献
4.
5.
6.
7.
8.
9.
Calciphylaxis – a topical overview 总被引:3,自引:0,他引:3
G Arseculeratne† AT Evans‡ SM Morley† 《Journal of the European Academy of Dermatology and Venereology》2006,20(5):493-502
'Calciphylaxis', a calcification syndrome associated with ischaemic cutaneous necrosis, is acquired naturally in humans in disease states. It is a life and limb-threatening complication, usually observed in patients with renal disease and secondary hyperparathyroidism, but known to occur in the absence of renal or parathyroid disease. The reported mortality rate, which ranges from 60-80%, relates to wound infection, sepsis and organ failure. It is a small-vessel vasculopathy, which is estimated to occur in about 4% of haemodialysis patients. Clinically, violaceous, reticulate areas of cutaneous necrosis and eschar may be evident, particularly in the extremities. In addition to the clinical picture, a raised calcium phosphorous product, an elevated parathyroid hormone level, radiographic evidence of vessel and soft-tissue calcification and the finding of mural calcification affecting small arteries and arterioles on histopathology help to confirm the diagnosis of this entity which generally has a poor prognosis. A high index of suspicion and an active multidisciplinary management approach, with rigorous attention to wound care and prevention of sepsis, are vital in the management of these patients. In this overview, we discuss the pathophysiology, clinical features and associations, risk factors, diagnosis and management issues relating to calciphylaxis. 相似文献
10.
Bastiaan R Klarenbeek Alexander AFA Veenhof Elly SM de Lange Willem A Bemelman Roberto Bergamaschi Piet Heres Antonio M Lacy Wim T van den Broek Donald L van der Peet Miguel A Cuesta 《BMC surgery》2007,7(1):16