全文获取类型
收费全文 | 2375篇 |
免费 | 283篇 |
国内免费 | 1篇 |
专业分类
耳鼻咽喉 | 27篇 |
儿科学 | 62篇 |
妇产科学 | 75篇 |
基础医学 | 359篇 |
口腔科学 | 18篇 |
临床医学 | 309篇 |
内科学 | 409篇 |
皮肤病学 | 76篇 |
神经病学 | 155篇 |
特种医学 | 93篇 |
外国民族医学 | 1篇 |
外科学 | 473篇 |
综合类 | 88篇 |
一般理论 | 2篇 |
预防医学 | 177篇 |
眼科学 | 19篇 |
药学 | 190篇 |
1篇 | |
中国医学 | 3篇 |
肿瘤学 | 122篇 |
出版年
2022年 | 15篇 |
2021年 | 36篇 |
2019年 | 26篇 |
2018年 | 34篇 |
2017年 | 24篇 |
2016年 | 29篇 |
2015年 | 37篇 |
2014年 | 66篇 |
2013年 | 88篇 |
2012年 | 106篇 |
2011年 | 80篇 |
2010年 | 61篇 |
2009年 | 67篇 |
2008年 | 90篇 |
2007年 | 108篇 |
2006年 | 93篇 |
2005年 | 99篇 |
2004年 | 95篇 |
2003年 | 76篇 |
2002年 | 73篇 |
2001年 | 88篇 |
2000年 | 73篇 |
1999年 | 75篇 |
1998年 | 34篇 |
1997年 | 34篇 |
1996年 | 21篇 |
1995年 | 30篇 |
1994年 | 31篇 |
1993年 | 26篇 |
1992年 | 83篇 |
1991年 | 68篇 |
1990年 | 54篇 |
1989年 | 76篇 |
1988年 | 60篇 |
1987年 | 44篇 |
1986年 | 37篇 |
1985年 | 51篇 |
1984年 | 54篇 |
1983年 | 38篇 |
1982年 | 30篇 |
1981年 | 24篇 |
1980年 | 22篇 |
1979年 | 28篇 |
1978年 | 17篇 |
1977年 | 30篇 |
1976年 | 17篇 |
1974年 | 23篇 |
1973年 | 20篇 |
1968年 | 14篇 |
1966年 | 18篇 |
排序方式: 共有2659条查询结果,搜索用时 15 毫秒
11.
The relation between sulcal prefrontal cortex (SPC) and medial prefrontal cortex (MPC) self-stimulation and energy balance was investigated in rats. SPC but not MPC self-stimulation induced feeding but not the gnawing of wooden blocks. SPC but not MPC self-stimulation enhanced weight gain over several weeks of exposure to stimulation. Food deprivation (48 hr but not 24 hr) increased SPC self-stimulation rates under a 5-s fixed-interval reinforcement schedule and decreased current thresholds for SPC self-stimulation. MPC self-stimulation was unaffected by food deprivation. Insulin (4 U/kg) and 2-deoxy-D-glucose (300 mg/kg) inhibited both SPC and MPC self-stimulation, probably through interfering with performance. Satiety induced by prolonged intake of a sweetened solution or deprivation-induced feeding moderately facilitated SPC self-stimulation. Overall, it appears that SPC but not MPC self-stimulation modulates, and is modulated by, energy balance. 相似文献
12.
13.
14.
15.
Recurrent postcoital lower-extremity streptococcal erythroderma in women. Streptococcal-sex syndrome
Two women with underlying distortion of their lower-body lymphatic systems from neoplasia and surgery or radiation therapy had recurrent episodes of lower-extremity erythroderma temporally associated with sexual intercourse. Both women had vaginal colonization with Streptococcus agalactiae (group B); one was shown to have recurrent bacteremia with this organism at the time of the episodes. Erythroderma developed in these women possibly because of seeding of S agalactiae in the vaginal soft tissues during coitus. 相似文献
16.
Jan McGregor Hepburn 《British Journal of Psychotherapy》1992,9(1):24-32
ABSTRACT. This paper is an attempt to think about a process and experience which is essentially before thinking in its origins; that is to say, the maternal experience of holding the baby in mind and the baby's experience of being held. I have looked at the issue subjectively and anecdotally, for which in the end I make no apology as I can see no other way to proceed, at least in the first instance; and I want to think about how this thinking applies to the practice of psychoanalytic psychotherapy. 相似文献
17.
Bilateral six-hydroxydopamine (6-OHDA) lesions were placed in the amygdala of rats self-administering cocaine (1.5 mg/kg per injection i.v.) under a progressive ratio schedule of reinforcement. Post-lesion access to three doses of cocaine (1.5, 0.75 and 0.37 mg/kg per injection i.v.) revealed a lesion effect only at the highest dose. At this dose, the lesion caused a significant increase in breaking point. No change in the breaking point was produced at the lower two doses. The biochemical results show a significant reduction in dopamine and DOPAC levels within the amygdala and an increase in dopamine within the NACC. In contrast, noradrenaline and serotonin (5-HT) levels were unaffected by the lesion in any of the dissected areas. These results demonstrate that no specific effect on cocaine reinforcement was produced by 6-OHDA lesions of the amygdala. The possibility that the lesion may have attenuated the anxiogenic qualities of the high dose of cocaine is discussed. 相似文献
18.
19.
20.