全文获取类型
收费全文 | 706094篇 |
免费 | 48915篇 |
国内免费 | 1304篇 |
专业分类
耳鼻咽喉 | 9168篇 |
儿科学 | 23273篇 |
妇产科学 | 17618篇 |
基础医学 | 110442篇 |
口腔科学 | 19973篇 |
临床医学 | 63787篇 |
内科学 | 134343篇 |
皮肤病学 | 16161篇 |
神经病学 | 49436篇 |
特种医学 | 25747篇 |
外国民族医学 | 76篇 |
外科学 | 104515篇 |
综合类 | 14833篇 |
现状与发展 | 2篇 |
一般理论 | 160篇 |
预防医学 | 51420篇 |
眼科学 | 16321篇 |
药学 | 53988篇 |
3篇 | |
中国医学 | 2359篇 |
肿瘤学 | 42688篇 |
出版年
2019年 | 5436篇 |
2018年 | 7860篇 |
2017年 | 6106篇 |
2016年 | 6822篇 |
2015年 | 7551篇 |
2014年 | 10271篇 |
2013年 | 15389篇 |
2012年 | 20500篇 |
2011年 | 21493篇 |
2010年 | 12722篇 |
2009年 | 11934篇 |
2008年 | 20007篇 |
2007年 | 21522篇 |
2006年 | 21909篇 |
2005年 | 20448篇 |
2004年 | 20000篇 |
2003年 | 18947篇 |
2002年 | 18468篇 |
2001年 | 36329篇 |
2000年 | 36902篇 |
1999年 | 30385篇 |
1998年 | 7880篇 |
1997年 | 6663篇 |
1996年 | 6970篇 |
1995年 | 6630篇 |
1994年 | 6101篇 |
1993年 | 5593篇 |
1992年 | 22978篇 |
1991年 | 22934篇 |
1990年 | 22319篇 |
1989年 | 22088篇 |
1988年 | 20044篇 |
1987年 | 19425篇 |
1986年 | 18472篇 |
1985年 | 17315篇 |
1984年 | 12704篇 |
1983年 | 10743篇 |
1982年 | 5926篇 |
1979年 | 11521篇 |
1978年 | 8131篇 |
1977年 | 6833篇 |
1976年 | 6597篇 |
1975年 | 7270篇 |
1974年 | 8500篇 |
1973年 | 8144篇 |
1972年 | 7664篇 |
1971年 | 7132篇 |
1970年 | 6881篇 |
1969年 | 6307篇 |
1968年 | 5784篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
51.
52.
Elizabeth Campbell Ph.D. Danna Peterkin R.N. Richard Abbott M.B. B.S. John Rogers M.B. B.S. 《Preventive medicine》1997,26(6):801-807
Background.Computers that collect data from patients and provide both patients and practitioners with printed feedback on a range of health risks are a tool for assisting general practitioners with preventive care. This study assessed the impact of computer-generated printed feedback on cervical screening among women who were underscreened for cervical cancer.Method.Female attenders at two Australian general practices were randomly allocated to Experimental or Control groups. Women in both groups completed a health risk survey on a touch screen computer prior to their consultation. Those in the Experimental group received printed pages summarizing their results, including their eligibility for cervical screening and last Pap test, for themselves and their doctor. The number and proportion of underscreened women who had a Pap test in the 6 months after completing the computer survey, as determined by pathology records, were examined.Results.Of the 679 participants, 139 were classified as underscreened on the basis of self-report (74 Experimental, 65 Control) and 272 on the basis of their pathology records (148 Experimental, 124 Control). Overall about one-third of women had a test in the 6-month period, and the differences between the groups were not significant for women overall (18–70 years) or for women 18–49 years. Among women 50–70 who were underscreened based on self-report, those receiving the printout were more likely to have a Pap test in the next 6 months (P< 0.05). This pattern was also evident, but did not reach statistical significance, for older women who were underscreened based on pathology records.Conclusions.We are unable to draw conclusions regarding the effectiveness of the computer system due to the modest proportions of women screened, the small numbers, and the fact that the computer survey may have created an intervention effect in the Control group. As the study suggests the computer system is acceptable to women and may be effective for encouraging screening among older women, further exploration of the system is desirable. 相似文献
53.
In this paper, the authors describe some of the complexities of collecting and presenting data on race and ethnicity based on the experiences of the Bureau of the Census. Different methods of data collection, different content and format of questions, and different definitions make it difficult to collect consistent race and ethnic data across data systems. The Bureau of the Census experiences have shown that changing ethnic self-identity and concepts, intent of the question, consistency of reporting, and the classification of persons of mixed racial parentage affect the quality of the data. These are some of the issues that must be addressed as statistical agencies and researchers seek to provide comparable race and ethnic data. 相似文献
54.
55.
56.
57.
Pankaj Hari Anand Srivastava Arun Kumar Gupta Rajendra N. Srivastava 《Pediatric nephrology (Berlin, Germany)》1997,11(4):497-498
Acute renal failure (ARF) developed in a 7-week-old infant due to bilateral candidal bezoars (fungal balls) causing obstruction
at the pelviureteric junction. The baby was born at term with an appropriate birthweight, and had been treated with broad-spectrum
antibiotics for respiratory distress and septicemia during the 1st week of life. Recovery from ARF followed renal decompression
with bilateral nephrostomy tube placement and parenteral administration of amphotericin B and 5-flucytosine.
Received August 21, 1996; received in revised form and accepted January 3, 1997 相似文献
58.
59.
60.