收费全文 | 1398206篇 |
免费 | 102468篇 |
国内免费 | 4178篇 |
耳鼻咽喉 | 19007篇 |
儿科学 | 47059篇 |
妇产科学 | 39977篇 |
基础医学 | 194469篇 |
口腔科学 | 36852篇 |
临床医学 | 119430篇 |
内科学 | 287248篇 |
皮肤病学 | 34406篇 |
神经病学 | 111485篇 |
特种医学 | 56584篇 |
外国民族医学 | 663篇 |
外科学 | 216743篇 |
综合类 | 28361篇 |
现状与发展 | 1篇 |
一般理论 | 414篇 |
预防医学 | 104375篇 |
眼科学 | 29227篇 |
药学 | 101679篇 |
2篇 | |
中国医学 | 2526篇 |
肿瘤学 | 74344篇 |
2021年 | 11899篇 |
2019年 | 12255篇 |
2018年 | 14456篇 |
2017年 | 11820篇 |
2016年 | 13112篇 |
2015年 | 14825篇 |
2014年 | 19994篇 |
2013年 | 30232篇 |
2012年 | 37215篇 |
2011年 | 39566篇 |
2010年 | 25335篇 |
2009年 | 25193篇 |
2008年 | 38071篇 |
2007年 | 40440篇 |
2006年 | 41521篇 |
2005年 | 40259篇 |
2004年 | 39359篇 |
2003年 | 38633篇 |
2002年 | 37756篇 |
2001年 | 66567篇 |
2000年 | 68639篇 |
1999年 | 58859篇 |
1998年 | 17850篇 |
1997年 | 16363篇 |
1996年 | 16807篇 |
1995年 | 16536篇 |
1994年 | 15709篇 |
1993年 | 14422篇 |
1992年 | 47399篇 |
1991年 | 46251篇 |
1990年 | 44608篇 |
1989年 | 42720篇 |
1988年 | 39136篇 |
1987年 | 38556篇 |
1986年 | 35868篇 |
1985年 | 34634篇 |
1984年 | 26322篇 |
1983年 | 22342篇 |
1982年 | 13560篇 |
1981年 | 12557篇 |
1979年 | 22878篇 |
1978年 | 16377篇 |
1977年 | 14091篇 |
1976年 | 12891篇 |
1975年 | 13885篇 |
1974年 | 15669篇 |
1973年 | 14997篇 |
1972年 | 13697篇 |
1971年 | 12414篇 |
1970年 | 11685篇 |
The exercise pressor reflex is a feedback mechanism engaged upon stimulation of mechano- and metabosensitive skeletal muscle afferents. Activation of these afferents elicits a reflex increase in heart rate, blood pressure, and ventilation in an intensity-dependent manner. Consequently, the exercise pressor reflex has been postulated to be one of the principal mediators of the cardiorespiratory responses to exercise. In this updated review, we will discuss classical and recent advancements in our understating of the exercise pressor reflex function in both human and animal models. Particular attention will be paid to the afferent mechanisms and pathways involved during its activation, its effects on different target organs, its potential role in the abnormal cardiovascular response to exercise in diseased states, and the impact of age and biological sex on these responses. Finally, we will highlight some unanswered questions in the literature that may inspire future investigations in the field.
相似文献Female Genital mutilation/cutting (FGM/C) is associated with enduring psychiatric complications. In this study, we investigate the rates of co-morbid abuses and polyvictimization experienced by survivors of FGM/C. This is a sub-analysis of a cohort study examining the patient population at the EMPOWER Center for Survivors of Sex Trafficking and Sexual Violence in New York City. A retrospective chart-review of electronic medical records was conducted for all consenting adult patients who had FGM/C and had an intake visit between January 16, 2014 and March 6, 2020. Of the 80 participants, ages ranged from 20 to 62 years with a mean of 37.4 (SD?=?9.1) years. In addition to FGM/C, participants were victims of physical abuse (43; 53.8%), emotional abuse (35; 43.8%), sexual abuse (35; 43.8%), forced marriage (20; 25%), child marriage (13; 16.3%), and sex trafficking (1; 1.4%). There was a high degree of polyvictimization, with 41 (51.2%) experiencing 3 or more of the aforementioned abuses. Having FGM/C on or after age 13 or having a higher total abuse score was also found to be strong predictors of depression and PTSD. The high rates of polyvictimization among survivors of FGM/C are associated with development of depression and PTSD. Despite co-morbid abuses, patients still attribute substantial psychiatric symptoms to their FGM/C. Health care providers should understand the high risk of polyvictimization when caring for this patient population.
相似文献