【名词&注释】
肾阳虚(kidney-yang deficiency)、疏肝理气(relieving the depressed liver)、疏肝解郁(relieving liver qi stagnation)、肾阴虚(kidney yin deficiency)
[单选题]《素问·至真要大论》认为,"诸寒收引,皆属于肾",其"肾"指的是
A. 肾阳虚 B. 肾阴虚(kidney yin deficiency) C. 肾气虚 D. 肾不藏精 E. 肾不主水