【名词&注释】
生物降解(biodegradation)、钛合金(titanium alloy)、兴奋性(excitability)、脾肾阳虚(yang deficiency of spleen and kidney)、迷走神经(vagus nerve)、密切相关(closely related)、疱疹病毒(herpesvirus)、肾阳虚衰(deficiency of the kidney-yang)
[单选题]与泄泻发病密切相关(closely related)的内因为( )
A. 肾阳虚衰(deficiency of the kidney-yang)
B. 脾胃虚弱
C. 肝脾不和
D. 脾肾阳虚
E. 心肾不交