若a＞0,b＞0,则不等式\( -b＜\frac{1}{x}＜a\)的充分必要条件为 ( )
A. -\( \frac{1}{b}\text{＜}\text{x}\text{＜}\text{0}\text{或}\text{0}\text{＜}\text{x}＜\frac{1}{a}\)
B. \( -\frac{1}{a}＜x＜\frac{1}{b}\) C. \( x＜-\frac{1}{b}或x＞\frac{1}{a}\) D. \( x＜\frac{-1}{a}或x＞\frac{1}{b}\)
