全文获取类型
收费全文 | 937303篇 |
免费 | 66654篇 |
国内免费 | 1373篇 |
专业分类
耳鼻咽喉 | 13037篇 |
儿科学 | 24485篇 |
妇产科学 | 23375篇 |
基础医学 | 133649篇 |
口腔科学 | 28370篇 |
临床医学 | 80933篇 |
内科学 | 184431篇 |
皮肤病学 | 19435篇 |
神经病学 | 72609篇 |
特种医学 | 36982篇 |
外国民族医学 | 79篇 |
外科学 | 153018篇 |
综合类 | 18084篇 |
现状与发展 | 1篇 |
一般理论 | 234篇 |
预防医学 | 61892篇 |
眼科学 | 21371篇 |
药学 | 72863篇 |
3篇 | |
中国医学 | 2179篇 |
肿瘤学 | 58300篇 |
出版年
2018年 | 9064篇 |
2017年 | 7131篇 |
2016年 | 7842篇 |
2015年 | 8990篇 |
2014年 | 12127篇 |
2013年 | 17642篇 |
2012年 | 24345篇 |
2011年 | 25372篇 |
2010年 | 14971篇 |
2009年 | 14428篇 |
2008年 | 24874篇 |
2007年 | 26016篇 |
2006年 | 26774篇 |
2005年 | 25725篇 |
2004年 | 24835篇 |
2003年 | 23901篇 |
2002年 | 23405篇 |
2001年 | 54856篇 |
2000年 | 56697篇 |
1999年 | 47083篇 |
1998年 | 10795篇 |
1997年 | 9536篇 |
1996年 | 9653篇 |
1995年 | 8987篇 |
1994年 | 8322篇 |
1993年 | 7629篇 |
1992年 | 35569篇 |
1991年 | 33978篇 |
1990年 | 32818篇 |
1989年 | 31947篇 |
1988年 | 29066篇 |
1987年 | 28304篇 |
1986年 | 26344篇 |
1985年 | 25193篇 |
1984年 | 17881篇 |
1983年 | 15169篇 |
1982年 | 7815篇 |
1981年 | 6797篇 |
1979年 | 15833篇 |
1978年 | 10634篇 |
1977年 | 9080篇 |
1976年 | 7886篇 |
1975年 | 8648篇 |
1974年 | 10494篇 |
1973年 | 9877篇 |
1972年 | 9372篇 |
1971年 | 8862篇 |
1970年 | 8449篇 |
1969年 | 7954篇 |
1968年 | 7209篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
151.
152.
Frederic T. Pender 《Journal of human nutrition and dietetics》1989,2(6):423-427
The study described tested the hypothesis that increasing amounts of dietary fibre (DF) in the diet of patients on haemodialysis (HD) may achieve positive clinical benefit without adversely affecting serum potassium and plasma phosphate. The current diet of 20 home HD patients was supplemented with 15g unprocessed wheat bran incorporated into three 'bran muffins' eaten daily for a trial period of 28 days. During this period patients reported an improvement in bowel habit. Serum potassium decreased slightly but not significantly ( P =0.242) but there was a significant rise in plasma phosphate ( P =0.004). These findings suggest that when increasing DF in devising HD dietary regimes, plasma phosphate is possibly the more sensitive biochemical variable following introduction of wheat bran. 相似文献
153.
154.
155.
156.
This research was designed to test the extent to which health education and health services administration students' perceptions of their roles as professionals matched the expectations of professional faculty. These perceptions were found to match in general. However, doubt was cast on the extent to which internships or practicums contributed to this result, since there was no change in student responses between the beginning of the junior year and end of the senior year, a period which includes fieldwork and most of the professional coursework presumed to influence professional development. Additional research is required to test this result with other student populations in other health professions and identify the point at which professional role and task definitions are amenable to change. 相似文献
157.
158.
Norfloxacin, a new quinolinecarboxylic acid derivative, was administered to 30 male patients with gonococcal urethritis at a daily dose of 600 mg for 7-21 days. The clinical response was evaluated after administration of 7 days as excellent; Negative culture of N. gonorrhoeae. WBC less than 3/hpf in first voided urine sediment, good; Negative culture, WBC greater than or equal to 3/hpf, and poor; Positive culture. The result was excellent in 14 cases and good in 16 cases. No subjective side effects were observed. The minimum inhibitory concentration (MIC) distribution against the clinically isolated 30 strains of N. gonorrhoeae ranged from 0.0096 micrograms/ml to 0.34 micrograms/ml. Seven of thirty strains were resistant to ABPC. The MIC of these 7 strains ranged from 0.018 micrograms/ml to 0.18 micrograms/ml. Seven cases with ABPC resistant strains had a similar clinical response to other cases. Twelve patients (40%) developed post gonococcal urethritis for 7-14 days after treatment. Clinical observation of this series suggests that a 7 day therapy of Norfloxacin for the patients with gonococcal urethritis is sufficiently effective and that treatment should be changed to other antibacterial agents in the case of post gonococcal urethritis, since continuous administration for more than 7 days of Norfloxacin is not so effective. 相似文献
159.
R W Wulkan L Zwang T L Liem B G Blijenberg B Leijnse 《Zeitschrift für klinische Chemie und klinische Biochemie》1987,25(10):719-722
An expert system for evaluation of X-ray diffraction patterns of urinary calculi is described and evaluated. The software was developed using the PERSONAL CONSULTANT expert system shell from Texas Instruments. 相似文献
160.