全文获取类型
收费全文 | 1730篇 |
免费 | 157篇 |
国内免费 | 46篇 |
专业分类
耳鼻咽喉 | 83篇 |
儿科学 | 92篇 |
妇产科学 | 28篇 |
基础医学 | 197篇 |
口腔科学 | 56篇 |
临床医学 | 217篇 |
内科学 | 365篇 |
皮肤病学 | 18篇 |
神经病学 | 168篇 |
特种医学 | 151篇 |
外科学 | 167篇 |
综合类 | 45篇 |
一般理论 | 3篇 |
预防医学 | 149篇 |
眼科学 | 21篇 |
药学 | 115篇 |
1篇 | |
肿瘤学 | 57篇 |
出版年
2022年 | 12篇 |
2021年 | 21篇 |
2019年 | 24篇 |
2018年 | 32篇 |
2017年 | 36篇 |
2016年 | 30篇 |
2015年 | 36篇 |
2014年 | 47篇 |
2013年 | 58篇 |
2012年 | 77篇 |
2011年 | 66篇 |
2010年 | 48篇 |
2009年 | 41篇 |
2008年 | 69篇 |
2007年 | 81篇 |
2006年 | 71篇 |
2005年 | 51篇 |
2004年 | 54篇 |
2003年 | 44篇 |
2002年 | 41篇 |
2001年 | 39篇 |
2000年 | 38篇 |
1999年 | 43篇 |
1998年 | 62篇 |
1997年 | 69篇 |
1996年 | 64篇 |
1995年 | 53篇 |
1994年 | 48篇 |
1993年 | 37篇 |
1992年 | 25篇 |
1991年 | 42篇 |
1990年 | 33篇 |
1989年 | 35篇 |
1988年 | 61篇 |
1987年 | 49篇 |
1986年 | 46篇 |
1985年 | 31篇 |
1984年 | 20篇 |
1983年 | 14篇 |
1982年 | 21篇 |
1981年 | 12篇 |
1980年 | 12篇 |
1979年 | 17篇 |
1978年 | 16篇 |
1977年 | 18篇 |
1975年 | 7篇 |
1974年 | 15篇 |
1973年 | 8篇 |
1972年 | 7篇 |
1971年 | 7篇 |
排序方式: 共有1933条查询结果,搜索用时 187 毫秒
1.
2.
Sebastian Bonner Thomas Matte Mitchell Rubin Joanne K Fagan Jennifer Ahern David Evans 《The Journal of asthma》2006,43(1):31-35
Although studies have documented underuse of controller medications and overuse of short-acting inhaled ss(2)-agonist among children with persistent asthma in disadvantaged communities, the persistence of oral ss(2)-agonist use in pediatric practice has not been studied since inhaled short-acting ss(2)-agonists became widespread. We describe medications used to treat asthma among children 3 to 5 years of age at 10 Head Start and other subsidized preschool centers in East and Central Harlem, New York City. We interviewed 149 parents/guardians of children who were identified as having probable asthma based on physician's diagnosis, persistent symptoms, hospitalization, and medication use. We classified 86 of the 149 children (58%) as having current persistent asthma. Only 15 of them (17%) were reported to have used controller medications at least 5 days/week in the last 4 weeks-only 2 of whom used inhaled corticosteroids. By contrast, 53 children (62%) used oral ss(2)-agonist in the last 4 weeks, often (72%) in conjunction with nebulized or inhaled short-acting ss(2)-agonist. Use of oral ss(2)-agonist was associated with more severe symptoms. This study documents the continued widespread use of oral ss(2)-agonist for treatment of children in a low-income community with high prevalence of asthma. 相似文献
3.
The authors screened for alcoholism 145 consecutive patients who presented with sexual dysfunction or disorders. Using the Michigan Alcoholic Screening Test (MAST), 29% of the patients scored in the probable alcoholic range. Probable alcoholics were more likely to present without a partner and claimed higher sex drive than nonalcoholic patients. Probable alcoholic males reported less joy and vigor than probable alcoholic females, while the reverse held for the nonalcoholic groups. Blind to the MAST results, the staff made six alcohol-related diagnoses and referred one patient for alcohol treatment. The authors discussed the importance of training faculty and resident staff in the relationship of alcohol abuse associated with psychosexual dysfunctions. 相似文献
4.
5.
Carel Bron Michel Wensing Jo LM Franssen Rob AB Oostendorp 《BMC musculoskeletal disorders》2007,8(1):107
Background
Shoulder disorders are a common health problem in western societies. Several treatment protocols have been developed for the clinical management of persons with shoulder pain. However available evidence does not support any protocol as being superior over others. Systematic reviews provide some evidence that certain physical therapy interventions (i.e. supervised exercises and mobilisation) are effective in particular shoulder disorders (i.e. rotator cuff disorders, mixed shoulder disorders and adhesive capsulitis), but there is an ongoing need for high quality trials of physical therapy interventions. Usually, physical therapy consists of active exercises intended to strengthen the shoulder muscles as stabilizers of the glenohumeral joint or perform mobilisations to improve restricted mobility of the glenohumeral or adjacent joints (shoulder girdle). It is generally accepted that a-traumatic shoulder problems are the result of impingement of the subacromial structures, such as the bursa or rotator cuff tendons. Myofascial trigger points (MTrPs) in shoulder muscles may also lead to a complex of symptoms that are often seen in patients diagnosed with subacromial impingement or rotator cuff tendinopathy. Little is known about the treatment of MTrPs in patients with shoulder disorders. 相似文献6.
Changing patterns of hip fracture care before and after implementation of the prospective payment system 总被引:6,自引:0,他引:6
We tested the hypothesis that since the implementation of the prospective payment system (PPS), elderly patients hospitalized for hip fractures receive shorter, less care-intensive hospitalizations and are more frequently institutionalized. In blinded fashion, we reviewed the charts of elderly patients with hip fractures admitted to a municipal hospital from 1981 through 1985. Demographic and clinical characteristics of patients treated before implementation of the PPS were similar to patients treated thereafter. After implementation of the PPS, the mean length of hospitalization fell from 16.6 to 10.3 days, and the mean number of physical therapy sessions received decreased from 9.7 to 4.9. Concomitantly, the proportion of patients discharged to a nursing home increased (21% to 48%), as did the proportion receiving nursing home care at six months after discharge (13% to 39%). This increase in long-term nursing home placement suggests that the quality of care for elderly patients with hip fractures may have deteriorated. 相似文献
7.
8.
9.
E A Fagan 《British journal of hospital medicine》1992,47(2):127-131
Recent advances in viral hepatitis reflect the progress of molecular biology. Their clinical applications may provide clues for future prevention. 相似文献
10.
S C Fagan V Bindlish S Robert S P Steigerwalt N M Ramadan 《Journal of clinical pharmacology》1992,32(1):66-69
The effect of oral nifedipine on cerebral blood flow velocity was studied in six elderly hypertensive patients using transcranial Doppler. Serial measurements of blood pressure (BP), middle cerebral artery (MCA) flow velocity and nifedipine serum concentrations were obtained over an 8-hour period. The authors found a significant inverse relationship between MCA velocities and nifedipine concentrations, independent of BP changes. These results are consistent with a direct vasodilatory effect of nifedipine on cerebral vessels and support the use of TCD in pharmacodynamic investigations of the cerebral vasculature. 相似文献