全文获取类型
收费全文 | 6059篇 |
免费 | 798篇 |
国内免费 | 21篇 |
专业分类
耳鼻咽喉 | 44篇 |
儿科学 | 403篇 |
妇产科学 | 170篇 |
基础医学 | 945篇 |
口腔科学 | 131篇 |
临床医学 | 682篇 |
内科学 | 1329篇 |
皮肤病学 | 156篇 |
神经病学 | 362篇 |
特种医学 | 280篇 |
外科学 | 679篇 |
综合类 | 233篇 |
现状与发展 | 30篇 |
一般理论 | 2篇 |
预防医学 | 592篇 |
眼科学 | 102篇 |
药学 | 395篇 |
中国医学 | 19篇 |
肿瘤学 | 324篇 |
出版年
2023年 | 194篇 |
2021年 | 76篇 |
2020年 | 106篇 |
2019年 | 95篇 |
2018年 | 158篇 |
2017年 | 108篇 |
2016年 | 90篇 |
2015年 | 143篇 |
2014年 | 182篇 |
2013年 | 212篇 |
2012年 | 262篇 |
2011年 | 269篇 |
2010年 | 190篇 |
2009年 | 184篇 |
2008年 | 229篇 |
2007年 | 251篇 |
2006年 | 216篇 |
2005年 | 232篇 |
2004年 | 229篇 |
2003年 | 207篇 |
2002年 | 208篇 |
2001年 | 186篇 |
2000年 | 179篇 |
1999年 | 182篇 |
1998年 | 112篇 |
1997年 | 98篇 |
1996年 | 108篇 |
1995年 | 80篇 |
1994年 | 80篇 |
1993年 | 72篇 |
1992年 | 135篇 |
1991年 | 122篇 |
1990年 | 113篇 |
1989年 | 133篇 |
1988年 | 134篇 |
1987年 | 111篇 |
1986年 | 98篇 |
1985年 | 87篇 |
1984年 | 61篇 |
1983年 | 47篇 |
1982年 | 42篇 |
1980年 | 46篇 |
1979年 | 52篇 |
1978年 | 51篇 |
1976年 | 51篇 |
1975年 | 39篇 |
1974年 | 40篇 |
1973年 | 41篇 |
1971年 | 46篇 |
1967年 | 40篇 |
排序方式: 共有6878条查询结果,搜索用时 15 毫秒
1.
A mixed‐method study of effects of a therapeutic play intervention for children on parental anxiety and parents' perceptions of the intervention 下载免费PDF全文
2.
3.
Disposition and hypoglycaemic action of glipizide in diabetic patients given a single dose of nifedipine 总被引:4,自引:0,他引:4
A. A. Connacher A. H. El Debani T. E. Isles I. H. Stevenson 《European journal of clinical pharmacology》1987,32(1):81-83
Summary Adrenaline, when administered in dental local anaesthetic solutions, significantly reduces the plasma potassium concentration in young healthy adults. This effect occurs within 10 min of extravascular injections into the maxillary buccal sulcus and may influence the choice of local anaesthetic solution for patients receiving kaliuretic diuretics. 相似文献
4.
Hysterosalpingography was performed in 31 patients by means of a low-dose scanning-beam digital radiographic system. The technique permits adequate evaluation of gynecologic abnormalities while allowing significant reduction in radiation: 2.4-mR (6.1 X 10(-7) C/kg) exposure to the skin and 0.7-mrad (7 X 10(-6) Gy) mean dose to the ovaries per image obtained. Sixteen patients demonstrated readily recognizable and documented abnormalities, corroborated by laparoscopy, laparotomy, or other supportive evidence. 相似文献
5.
A lawsuit directed by parents at a day care program following an outbreak of infectious disease would most likely be based on the legal theory of negligence--the failure to exercise due care as required by circumstances. In the determination of liability for infectious diseases in child day care, the element of causation is most critical. Did the day care facility's actions or failure to act cause the harm? Another important question is whether an infectious disease can be occupational and under what circumstances. Although worker's compensation laws initially had no provisions for occupational disease, now all states recognize responsibility for them. Awareness of potential problems with legal liability and establishment of procedures to minimize risk are important for day care providers, public health officials, clinicians, and parents. 相似文献
6.
In a study of rock music preferences, listening/watching behavior, and views on destructive rock lyrics, 894 adolescents in grades 9 through 12 in rural, urban, suburban public, and metropolitan parochial schools were administered a questionnaire. Demographic information on parents was also collected. It was found that 17.5% of the students were fans of rock music with lyrics that promote homicide, suicide, or satanic practices (HSSR). Loglinear and multiple regression analyses were used to analyze the data. Parents' marital status, student sex, race, and school environment (urban, rural, suburban, etc.) were found to be significant predictors of HSSR status. As compared with non-HSSR fans, the HSSR fans were more likely to have parents who were “Never married” or “Remarried” and less likely to have parents in the “married” category. The HSSR fans were more likely to be male, white, and enrolled in urban schools but not parochial schools than expected; HSSR status also significantly predicted other music-related attitudes and behaviors. The HSSR fans reported liking both the sound and the lyrics of rock music more often than did non-HSSR fans, as did females and urban students. The HSSR fans more often felt that children under 10 years of age should be allowed to listen to HSSR lyrics, and they more frequently expressed the conviction that HSSR music does not affect adolescents' homicidal or self-destructive behavior. The HSSR fans and females reported more nearly complete knowledge of lyrics than did non-HSSR fans and males. The HSSR fans reported that they watch more MTV than did any other group except rural students. 相似文献
7.
8.
Patient education: history, development, and current directions of the American Cancer Society and the National Cancer Institute 总被引:1,自引:0,他引:1
With their unique perspectives in the identification, design, promotion, and evaluation of cancer patient education programs and services, the National Cancer Institute and the American Cancer Society have the abilities to meet a wide variety of cancer patient education needs. With federal support and connections to national organizations and the comprehensive and clinical cancer center networks, the National Cancer Institute has access to nationwide experts in medical care and the resources to develop, design, and promote quality, state-of-the-art education programs. The American Cancer Society, with its strong volunteer community base, can pull together local expertise and collaborate with local organizations to meet the special needs of local population groups. In addition, the American Cancer Society volunteer committees have the flexibility to individualize programming and resources to answer specific patient/family education problems. As the number of people affected by cancer continues to raise, and as organizations realize the need to maximize their resources with collaborative efforts, the National Cancer Institute and the American Cancer Society are challenged to focus their energies on the patient education initiatives that build upon and combine their unique strengths. 相似文献
9.
Similar dose responsiveness of hepatic glycogenolysis and gluconeogenesis to glucagon in vivo 总被引:6,自引:0,他引:6
R W Stevenson K E Steiner M A Davis G K Hendrick P E Williams W W Lacy L Brown P Donahue D B Lacy A D Cherrington 《Diabetes》1987,36(3):382-389
This study was undertaken to determine whether the dose-dependent effect of glucagon on gluconeogenesis parallels its effect on hepatic glycogenolysis in conscious overnight-fasted dogs. Endogenous insulin and glucagon secretion were inhibited by somatostatin (0.8 micrograms X kg-1 X min-1), and intraportal replacement infusions of insulin (213 +/- 28 microU X kg-1 X min-1) and glucagon (0.65 ng X kg-1 X min-1) were given to maintain basal hormone concentrations for 2 h (12 +/- 2 microU/ml and 108 +/- 23 pg/ml, respectively). The glucagon infusion was then increased 2-, 4-, 8-, or 12-fold for 3 h, whereas the rate of insulin infusion was left unchanged. Glucose production (GP) was determined with 3-[3H]glucose, and gluconeogenesis (GNG) was assessed with tracer (U-[14C]alanine conversion to [14C]glucose) and arteriovenous difference (hepatic fractional extraction of alanine, FEA) techniques. Increases in plasma glucagon of 53 +/- 8, 199 +/- 48, 402 +/- 28, and 697 +/- 149 pg/ml resulted in initial (15-30 min) increases in GP of 1.1 +/- 0.4 (N = 4), 4.9 +/- 0.5 (N = 4), 6.5 +/- 0.6 (N = 6), and 7.7 +/- 1.4 (N = 4) mg X kg-1 X min-1, respectively; increases in GNG (approximately 3 h) of 48 +/- 19, 151 +/- 50, 161 +/- 25, and 157 +/- 7%, respectively; and increases in FEA (3 h) of 0.14 +/- 0.07, 0.37 +/- 0.05, 0.42 +/- 0.04, and 0.40 +/- 0.17, respectively. In conclusion, GNG and glycogenolysis were similarly sensitive to stimulation by glucagon in vivo, and the dose-response curves were markedly parallel. 相似文献
10.