全文获取类型
收费全文 | 1476篇 |
免费 | 170篇 |
国内免费 | 49篇 |
专业分类
耳鼻咽喉 | 20篇 |
儿科学 | 147篇 |
妇产科学 | 19篇 |
基础医学 | 138篇 |
口腔科学 | 49篇 |
临床医学 | 127篇 |
内科学 | 373篇 |
皮肤病学 | 30篇 |
神经病学 | 37篇 |
特种医学 | 192篇 |
外科学 | 82篇 |
综合类 | 107篇 |
预防医学 | 119篇 |
眼科学 | 8篇 |
药学 | 98篇 |
中国医学 | 5篇 |
肿瘤学 | 144篇 |
出版年
2023年 | 15篇 |
2022年 | 12篇 |
2021年 | 31篇 |
2020年 | 24篇 |
2019年 | 11篇 |
2018年 | 25篇 |
2017年 | 43篇 |
2016年 | 37篇 |
2015年 | 38篇 |
2014年 | 75篇 |
2013年 | 89篇 |
2012年 | 47篇 |
2011年 | 44篇 |
2010年 | 76篇 |
2009年 | 76篇 |
2008年 | 54篇 |
2007年 | 87篇 |
2006年 | 59篇 |
2005年 | 38篇 |
2004年 | 43篇 |
2003年 | 25篇 |
2002年 | 17篇 |
2001年 | 40篇 |
2000年 | 24篇 |
1999年 | 27篇 |
1998年 | 82篇 |
1997年 | 66篇 |
1996年 | 63篇 |
1995年 | 54篇 |
1994年 | 47篇 |
1993年 | 44篇 |
1992年 | 16篇 |
1991年 | 13篇 |
1990年 | 22篇 |
1989年 | 25篇 |
1988年 | 32篇 |
1987年 | 16篇 |
1986年 | 29篇 |
1985年 | 18篇 |
1984年 | 14篇 |
1983年 | 13篇 |
1982年 | 13篇 |
1981年 | 6篇 |
1980年 | 8篇 |
1979年 | 6篇 |
1978年 | 7篇 |
1977年 | 6篇 |
1976年 | 13篇 |
1975年 | 12篇 |
1967年 | 3篇 |
排序方式: 共有1695条查询结果,搜索用时 31 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.
Najat C Daw Wayne L Furman Clinton F Stewart Lisa C Iacono Mark Krailo Mark L Bernstein Janet E Dancey Rose Anne Speights Susan M Blaney James M Croop Gregory H Reaman Peter C Adamson 《Journal of clinical oncology》2005,23(25):6172-6180
PURPOSE: Epidermal growth factor receptor is expressed in pediatric malignant solid tumors. We conducted a phase I trial of gefitinib, an epidermal growth factor receptor tyrosine kinase inhibitor, in children with refractory solid tumors. PATIENTS AND METHODS: Gefitinib (150, 300, 400, or 500 mg/m2) was administered orally to cohorts of three to six patients once daily continuously until disease progression or significant toxicity. Pharmacokinetic studies were performed during course one (day 1 through 28). RESULTS: Of the 25 enrolled patients, 19 (median age, 15 years) were fully evaluable for toxicity and received 54 courses. Dose-limiting toxicity was rash in two patients treated with 500 mg/m2 and elevated ALT and AST in one patient treated with 400 mg/m2. The maximum-tolerated dose was 400 mg/m2/d. The most frequent non-dose-limiting toxicities were grade 1 or 2 dry skin, anemia, diarrhea, nausea, and vomiting. One patient with Ewing's sarcoma had a partial response. Disease stabilized for 8 to > or = 60 weeks in two patients with Wilms' tumor and two with brainstem glioma (one exophytic). At 400 mg/m2, the median peak gefitinib plasma concentration was 2.2 microg/mL (range, 1.2 to 3.6 microg/mL) and occurred at a median of 2.3 hours (range, 2.0 to 8.3 hours) after drug administration. The median apparent clearance and median half-life were 14.8 L/h/m2 (range, 3.8 to 24.8 L/h/m2) and 11.7 hours (range, 5.6 to 22.8 hours), respectively. Gefitinib systemic exposures were comparable with those associated with antitumor activity in adults. CONCLUSION: Oral gefitinib is well tolerated in children. Development of the drug in combination with cytotoxic chemotherapy will be pursued. 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