全文获取类型
收费全文 | 14140篇 |
免费 | 1157篇 |
国内免费 | 81篇 |
专业分类
耳鼻咽喉 | 117篇 |
儿科学 | 551篇 |
妇产科学 | 338篇 |
基础医学 | 1782篇 |
口腔科学 | 225篇 |
临床医学 | 1573篇 |
内科学 | 2785篇 |
皮肤病学 | 445篇 |
神经病学 | 1353篇 |
特种医学 | 478篇 |
外科学 | 1841篇 |
综合类 | 355篇 |
一般理论 | 7篇 |
预防医学 | 1205篇 |
眼科学 | 256篇 |
药学 | 818篇 |
中国医学 | 4篇 |
肿瘤学 | 1245篇 |
出版年
2021年 | 162篇 |
2020年 | 106篇 |
2019年 | 181篇 |
2018年 | 214篇 |
2017年 | 160篇 |
2016年 | 178篇 |
2015年 | 194篇 |
2014年 | 269篇 |
2013年 | 413篇 |
2012年 | 565篇 |
2011年 | 631篇 |
2010年 | 328篇 |
2009年 | 347篇 |
2008年 | 583篇 |
2007年 | 614篇 |
2006年 | 590篇 |
2005年 | 608篇 |
2004年 | 542篇 |
2003年 | 504篇 |
2002年 | 505篇 |
2001年 | 483篇 |
2000年 | 509篇 |
1999年 | 430篇 |
1998年 | 181篇 |
1997年 | 168篇 |
1996年 | 117篇 |
1995年 | 130篇 |
1994年 | 124篇 |
1992年 | 363篇 |
1991年 | 352篇 |
1990年 | 366篇 |
1989年 | 349篇 |
1988年 | 267篇 |
1987年 | 299篇 |
1986年 | 307篇 |
1985年 | 307篇 |
1984年 | 203篇 |
1983年 | 229篇 |
1982年 | 124篇 |
1979年 | 202篇 |
1978年 | 140篇 |
1977年 | 124篇 |
1976年 | 139篇 |
1975年 | 134篇 |
1974年 | 144篇 |
1973年 | 136篇 |
1972年 | 107篇 |
1971年 | 101篇 |
1970年 | 119篇 |
1969年 | 104篇 |
排序方式: 共有10000条查询结果,搜索用时 12 毫秒
11.
Late-life migraine accompaniments--further experience 总被引:3,自引:0,他引:3
C M Fisher 《Stroke; a journal of cerebral circulation》1986,17(5):1033-1042
In 1980, 120 cases with late-life migrainous accompaniments resembling transient ischemic attacks were presented. In the present paper, 85 further cases examined in the past five years are analyzed. The findings support the concept advanced previously. In general, the cases are divided into the same categories: visual--21 cases, visual and paresthesias--6, visual and speech disturbance--2, visual, paresthesias and speech disturbance--3, visual, paresthesias, speech disturbance, and weakness--20, visual and brainstem symptoms--3, and cases without visual symptoms--32. The ages ranged from 40 to 73 years. Headache occurred in association with the episodes in only 40% of cases. There was a history of recurrent headache in 65%. The condition can justifiably be regarded as benign. Migrainous accompaniments account for some of the cases of transient ischemia with normal angiograms. Knowledge of the condition helps in the planning of rational management. 相似文献
12.
Desferrioxamine (DFO) metabolism and its pharmacokinetics were studied in a swine model using high-performance liquid chromatography. DFO and three iron-binding metabolites occurred in plasma. Interindividual differences in pharmacokinetics and metabolism were observed. Urine analysis in 4 pigs showed three iron-binding metabolites. The mean percent dose excreted in urine in the form of the parent drug was 45 +/- 10% and 10 +/- 2% (means +/- SD) in the form of metabolites. Of the total amount of the parent drug infused, 3 h after initiation, 87% was in the form of DFO, whereas 13% was present as the DFO-iron III complex which represented 45 mg of urinary iron elimination. The described DFO infusion protocol provides for sufficient DFO to chelate significant amounts of ferric iron in excess of normal levels, thus allowing experimental studies of iron chelation in a variety of disease states. 相似文献
13.
The qualities of daughter versus same-sex friend relationships were described by 151 married and widowed elderly women. The relation of these qualities to life satisfaction was assessed. Relationship qualities predicted life satisfaction in widowed women but not in married women. Significant predictors of life satisfaction for widows included the emotional support of daughters, the instrumental support of friends and friendship strength. In a comparison of the relationship qualities, both married and widowed respondents described daughters as providing more stimulation, ego support and utility than friends. Respondents also reported that relationships with daughters were stronger than those with friends. Married women described relationships with both daughters and friends as more stimulating than widowed women. The value of assessing qualitative indices compared to quantitative indices of later life relationships is discussed. 相似文献
14.
15.
16.
Janice F. Munro Debra Haire-Joshu Edwin B. Fisher H. James Wedner 《The Journal of asthma》1996,33(5):313-325
Low-income minority patients from East St. Louis, Illinois, a depressed midwestern urban city, who had visited acute care settings with asthma symptoms, participated in a focus group. Questions were constructed around the Health Belief Model to characterize participants' experiences in receiving asthma care, their confidence in long-term asthma self-management, barriers they perceived to managing their asthma, and recommendations they would make for improving asthma care in their community. Analysis of comments suggests an appreciable understanding of asthma triggers, limited coping behaviors for asthma symptoms, very limited practice of active asthma management, perception of the health care system as frequently insensitive to their needs or their knowledge of their own care, exchange of well-articulated information regarding how to deal with the system, and an apparent lack of awareness of any potential contribution of patient education or support system. 相似文献
17.
S.J. Gallacher G. Thomson W.D. Fraser B.M. Fisher C.G. Gemmell A.C. MacCuish 《Diabetic medicine》1995,12(10):916-920
Neutrophil bactericidal activity was assessed in patients with type 1 (n=45) and Type 2 diabetes mellitus (n=68) and non-diabetic control subjects (n=40) by measurement of whole blood chemiluminescence. Though chemiluminescence values tended to be highest in the non-diabetic subjects these differences were not statistically significant (mean ± SD) (2.73 ± 1.65 mV (controls), 2.33 ± 1.41 mV (Type 1 diabetes) and 2.38 ± 1.12 mV (Type 2 diabetes), F=1.12, p=0.33). Significant negative correlations were evident, however, in patients with both Type 1 and Type 2 diabetes between chemiluminescence and glycated haemoglobin (rs=-0.35, p=0.005 (Type 1), rs=-0.45, p=0.002 (Type 2), fructosamine (rs=-0.36, p=0.003 (Type 1), rs=-0.42, p=0.004 (Type 2)), and random blood glucose (rs=-0.25, p=0.04 (Type 1), rs=-0.48, p=0.001 (Type 2)). Changes in whole blood chemiluminescence in a further group of 10 patients with Type 2 diabetes mellitus commenced on insulin therapy were followed for 21 days. Serum fructosamine concentrations fell significantly over this time (524 ± 58 μmol l?1 to 405 ± 47 μmol l?1, p<0.001), however, although chemiluminescence values tended to rise these changes were not statistically significant (1.01 ± 0.38 mV to 1.60 ± 0.91 mV, S=4.24, df=5, p=0.52). These results suggest that impaired neutrophil bactericidal function is associated with poor blood glucose control. While it is likely that neutrophil bactericidal function will improve as blood glucose control improves, further studies are required both to confirm this and to demonstrate a reduction in the incidence of clinical bacterial infection. 相似文献
18.
W H Fisher R A Dorwart M Schlesinger S Epstein H Davidson 《Hospital & community psychiatry》1992,43(11):1114-1119
For almost three decades, many have regarded general hospital psychiatric units as the most appropriate setting for acute treatment of persons with serious mental illness who were once treated mostly in state hospitals. The extent to which this transfer has taken place and the differences between public and private general hospitals have been unclear. Using data from the 1988 National Mental Health Facilities Study and published data from the 1970s, the authors found that nearly half of all general hospitals providing psychiatric services treat persons with serious mental illness. Significant differences in case and payer mix were observed between public and private general hospitals, although these differences were smaller than in the 1970s. The findings suggest increased involvement by private general hospitals in treating patients reimbursed by public payers, but the findings also indicate that persons with serious mental illness and those using Medicaid are still more prevalent in public general hospitals than in private ones. 相似文献
19.
Ross W. James Peter A Howat K. John Fisher 《Australian and New Zealand journal of public health》1987,11(1):54-61
Health education campaigns which utilise the mass media generally employ advertising techniques. Television and print media are considered more influential, with radio being primarily used for awareness raising and campaign support messages. There is relatively little research into the effectiveness of radio talkback programs in promoting health or reducing illness. This paper argues a case for health and welfare professionals to utilise talkback radio as part of their health promotion activities. 相似文献
20.