For the function $f ( x ) = \frac { 1 } { x }$, what is the value of $\lim _ { n \rightarrow \infty } \sum _ { k = 1 } ^ { n } f \left( 1 + \frac { 2 k } { n } \right) \frac { 2 } { n }$? [3 points]\\
(1) $\ln 6$\\
(2) $\ln 5$\\
(3) $2 \ln 2$\\
(4) $\ln 3$\\
(5) $\ln 2$