全文获取类型
收费全文 | 37224篇 |
免费 | 3808篇 |
国内免费 | 32篇 |
专业分类
耳鼻咽喉 | 212篇 |
儿科学 | 1130篇 |
妇产科学 | 994篇 |
基础医学 | 5272篇 |
口腔科学 | 742篇 |
临床医学 | 4405篇 |
内科学 | 6774篇 |
皮肤病学 | 573篇 |
神经病学 | 3406篇 |
特种医学 | 1457篇 |
外国民族医学 | 3篇 |
外科学 | 4784篇 |
综合类 | 802篇 |
一般理论 | 45篇 |
预防医学 | 4478篇 |
眼科学 | 919篇 |
药学 | 2905篇 |
中国医学 | 49篇 |
肿瘤学 | 2114篇 |
出版年
2022年 | 285篇 |
2021年 | 641篇 |
2020年 | 355篇 |
2019年 | 612篇 |
2018年 | 624篇 |
2017年 | 496篇 |
2016年 | 553篇 |
2015年 | 591篇 |
2014年 | 821篇 |
2013年 | 1241篇 |
2012年 | 1790篇 |
2011年 | 1786篇 |
2010年 | 1044篇 |
2009年 | 932篇 |
2008年 | 1652篇 |
2007年 | 1746篇 |
2006年 | 1748篇 |
2005年 | 1648篇 |
2004年 | 1624篇 |
2003年 | 1527篇 |
2002年 | 1471篇 |
2001年 | 1232篇 |
2000年 | 1230篇 |
1999年 | 1065篇 |
1998年 | 468篇 |
1997年 | 409篇 |
1996年 | 389篇 |
1995年 | 339篇 |
1994年 | 350篇 |
1993年 | 340篇 |
1992年 | 830篇 |
1991年 | 796篇 |
1990年 | 785篇 |
1989年 | 682篇 |
1988年 | 709篇 |
1987年 | 661篇 |
1986年 | 610篇 |
1985年 | 673篇 |
1984年 | 552篇 |
1983年 | 432篇 |
1982年 | 272篇 |
1981年 | 290篇 |
1980年 | 264篇 |
1979年 | 469篇 |
1978年 | 350篇 |
1977年 | 264篇 |
1976年 | 273篇 |
1974年 | 286篇 |
1973年 | 262篇 |
1972年 | 272篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
71.
Insulin lispro is an insulin analogue that has the advantages of being fast-acting, convenient, and less likely to lead to hypoglycaemic episodes. Previous studies have proven its value in treating both Type 1 and Type 2 diabetes both alone and in combination with different treatment regimens.1,2 However, diabetes is heterogeneous and differs in etiology and clinical characteristics in different ethnic groups. Even with the same insulin treatment, different diets will produce different glycaemic profiles. Diet patterns differ between different ethnic groups. Traditional oriental foods are characterized by a higher proportion of carbohydrates and a lower proportion of fat compared to Caucasian diets. To date, there has been no study on the use of insulin lispro in Chinese diabetic patients. Whether the Chinese dietary pattern will affect the efficacy of insulin lispro treatment remains unknown. Therefore, we conducted this trial to assess the efficacy of insulin lispro treatment in Chinese patients. 相似文献
72.
73.
A J Taylor 《The New Zealand medical journal》1989,102(878):562-563
74.
Seventy patients with abnormal vaginal bleeding were examined with a Storz hysteroscope. The examination took an average of only 5 min. Sixty patients had the examination under general anaesthesia, five under paracervical block and five had no form of anaesthesia. All tolerated the procedure well. There were no complications directly related to the hysteroscopic examination. There was complete correlation between the histology of the endometrium obtained at subsequent curettage and the hysteroscopic findings. 相似文献
75.
76.
Lenka A. Taylor Jann Arends Arwen K. Hodina Clemens Unger Ulrich Massing 《Lipids in health and disease》2007,6(1):17
Background
It has been observed that ras-transformed cell lines in culture have a higher phosphatidylcholine (PC) biosynthesis rate as well as higher PC-degradation rate (increased PC-turnover) than normal cells. In correspondence to these findings, the concentrations of the PC-degradation product lyso-phosphatidylcholine (LPC) in cancer patients were found to be decreased. Our objective was the systematic investigation of the relationship between LPC and inflammatory and nutritional parameters in cancer patients. Therefore, plasma LPC concentrations were assessed in 59 cancer patients and related to nutritional and inflammatory parameters. To determine LPC in blood plasma we developed and validated a HPTLC method. 相似文献77.
The literature on the occurrence of moderate drinking in ex-alcoholics that has been published since the Rand report in 1976 is reviewed. Although differences in diagnosis, definitions of moderate drinking and length of follow-up make strict comparisons of the studies difficult, the majority of studies seem to indicate that the earlier reports of the frequency of such moderate drinking may be overly optimistic. Depending on the definition of moderate drinking that is used, the longer the interval required for alcoholics to sustain moderate, problem-free drinking, the less likely is such an outcome. Among treated alcoholics, the percentage probably ranges from about 2 to 12%; the percentage may be higher among alcoholics identified in community population samples. Thus far, the only factor common to alcoholics who are able to achieve moderate drinking is their being mild cases (i.e., having fewer lifetime alcohol-related problems than other alcoholics). Factors pertinent in assessing discrepancies between the various studies are discussed. 相似文献
78.
DA Taylor 《Environmental health perspectives》2002,110(9):A512-A513
79.
80.