全文获取类型
收费全文 | 531024篇 |
免费 | 27756篇 |
国内免费 | 499篇 |
专业分类
耳鼻咽喉 | 6692篇 |
儿科学 | 16991篇 |
妇产科学 | 12562篇 |
基础医学 | 92712篇 |
口腔科学 | 12397篇 |
临床医学 | 48570篇 |
内科学 | 95677篇 |
皮肤病学 | 11897篇 |
神经病学 | 34032篇 |
特种医学 | 19777篇 |
外国民族医学 | 53篇 |
外科学 | 78225篇 |
综合类 | 7655篇 |
现状与发展 | 2篇 |
一般理论 | 107篇 |
预防医学 | 38592篇 |
眼科学 | 11973篇 |
药学 | 41532篇 |
1篇 | |
中国医学 | 1127篇 |
肿瘤学 | 28705篇 |
出版年
2021年 | 3943篇 |
2018年 | 5762篇 |
2017年 | 4144篇 |
2016年 | 4893篇 |
2015年 | 5381篇 |
2014年 | 7145篇 |
2013年 | 10543篇 |
2012年 | 15647篇 |
2011年 | 17463篇 |
2010年 | 9991篇 |
2009年 | 8847篇 |
2008年 | 15760篇 |
2007年 | 17495篇 |
2006年 | 16991篇 |
2005年 | 16309篇 |
2004年 | 15918篇 |
2003年 | 15303篇 |
2002年 | 14811篇 |
2001年 | 22445篇 |
2000年 | 22991篇 |
1999年 | 18935篇 |
1998年 | 5242篇 |
1997年 | 4371篇 |
1996年 | 4402篇 |
1995年 | 4127篇 |
1992年 | 14426篇 |
1991年 | 15829篇 |
1990年 | 15961篇 |
1989年 | 15645篇 |
1988年 | 14325篇 |
1987年 | 14210篇 |
1986年 | 13182篇 |
1985年 | 12695篇 |
1984年 | 9399篇 |
1983年 | 8004篇 |
1982年 | 4186篇 |
1979年 | 8948篇 |
1978年 | 6389篇 |
1977年 | 5156篇 |
1976年 | 5510篇 |
1975年 | 6620篇 |
1974年 | 7427篇 |
1973年 | 7162篇 |
1972年 | 6600篇 |
1971年 | 6315篇 |
1970年 | 5892篇 |
1969年 | 5476篇 |
1968年 | 5163篇 |
1967年 | 4626篇 |
1966年 | 3965篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
51.
In experiments on albino rats it was established that three administrations of indomethacin in a dose of 0.01 g/kg body weight induced a severe damage of the liver characterized by disturbances of hepatocytic membranes, bile-producing and protein-producing functions of the liver, an enhancement of lipid peroxidation, a decrease of reduced glutathione pool. Antioxidants (tocopherol acetate, essentiale, legalon, flacumin) limit manifestations of indomethacin, hepatotoxicity, as a result of which tha functional-biochemical disorders in the liver show up to a lesser degree. During the combined use of antioxidants in indomethacin-induced lesions of the liver their hepatoprotective activity increases. 相似文献
52.
L R?stam R V Luepker M B Mittelmark D M Murray J S Slater H Blackburn 《American journal of preventive medicine》1988,4(5):249-254
To determine the potential effect of screening on referral patterns, an adult population sample (4,404 men, 5,164 women, 20-69 years of age) was systematically recruited and screened for hypercholesterolemia and then analyzed by different cholesterol referral recommendations. Using levels suggested by the Lipid Research Clinics Coronary Primary Prevention Trial (greater than or equal to 265 mg/dL), 7.3% of men and 5.8% of women would be referred for follow-up. With the suggested recommendations of the National Cholesterol Education Program (NCEP), (greater than or equal to 200 mg/dL), 49.2% of men and 40.2% of women would be referred. The use of age-related definitions of the NIH Consensus Conference on Lipid Lowering results in 28.0% referrals in men and 21.8% in women. From this population, hypercholesterolemia subjects (greater than or equal to 265 mg/dL at screening; n = 624) were invited for a second cholesterol determination (58% returned), which found 36% below the 265 mg/dL level. Population screening for cholesterol is likely to produce large numbers of patients for follow-up, with the actual numbers strongly dependent on cutoff levels and age-sex distributions. Referral and follow-up of these patients may place a significant load on an unprepared health care community. 相似文献
53.
54.
55.
56.
A. Giacometti O. Cirioni G. Greganti A. Fineo R. Ghiselli M. Del Prete F. Mocchegiani B. Fileni F. Caselli E. Petrelli V. Saba G. Scalise 《European journal of clinical microbiology & infectious diseases》2002,21(7):553-556
The in vitro activities of povidone iodine, potassium peroxymonosulfate, and dimethyldidecylammonium chloride were investigated
against 379 nosocomial isolates of Staphylococcus aureus and Pseudomonas aeruginosa responsible for surgical wound infections in patients operated on between July 1995 and June 2001. Overall, the isolates
were inhibited by the antiseptics at concentrations below those used routinely. In spite of increasing resistance to the various
antibiotics used to treat surgical wound infections, no significant variation in the susceptibility to antiseptics was demonstrated
during this 6-year study.
Electronic Publication 相似文献
57.
58.
Deep venous thrombosis and pulmonary embolism 总被引:2,自引:0,他引:2
All surgical patients are at risk for the development of deep venous thrombosis and subsequent pulmonary embolism or postphlebitic syndrome. The evolution of ultrasonographic imaging has increased the awareness of prevention, diagnosis, and treatment of deep venous thrombosis. Duplex imaging and Doppler color flow imaging have made the diagnosis of deep venous thrombosis relatively simple, painless, inexpensive, and definitive. These procedures have gained acceptance by both patients and physicians. Several risk factors have been identified that increase the chance of the development of deep venous thrombosis. These factors include a history of deep venous thrombosis, presence of a malignant process, increasing age, cigarette smoking, obesity, prolonged bed rest, and general anesthesia. The greater the number of risk factors, the more aggressive prophylaxis should be. Means of prophylaxis have improved, and surgeons now generally agree that some form of prophylaxis is required. Heparin and intermittent compression devices appear to be equally effective in preventing deep venous thrombosis. The addition of venous monitoring in high-risk patients permits immediate identification of the presence of deep venous thrombosis. During the last decade, the treatment of patients with deep venous thrombosis has changed little. Heparin followed by warfarin remains the treatment of choice. A small group of patients receive fibrinolytic therapy for deep venous thrombosis. Although the incidence of postoperative deep venous thrombosis has decreased during the last decade, it remains a significant complication. 相似文献
59.
A total of 102 patients were examined, 32 of these with true eczema, 38 with exudative mycosis of the soles, and 32 with eczema etiologically related to a fungal infection. Analysis of the immune and biochemical reactions in the examinees has shown a marked reduction of adenyl nucleotides in the leukocytic suspension and neutrophils of patients with a mycotic infection as against those with true eczema. The lowest creatine phosphate levels were detected in the leukocytic suspension and neutrophils of the patients suffering from eczema etiologically related to mycosis and exudative mycosis of the soles. These results give grounds to search for effective corrective therapy. 相似文献
60.
This paper discusses the application of intravenous Kalipsol anesthesia in combination with Seduxen (Relanium) in 22 patients who underwent antro-mastoidectomy (expanded) and fronto-ethmoidectomy. No complications related to the method of anesthesia were identified. It is concluded that the use of Kalipsol anesthesia in urgent ENT operations provides better surgical intervention. This method ensures adequate analgesia during operation. 相似文献