to go to the bottom of a matter; after all; when all is said and done; (in an interrogative sentence) finally; outcome; result

to investigate and deal with

to trace something to its source (idiom)

research; a study; CL:項|项[xiang4]; to research; to look into

in the end; after all; eventually

to investigate; to look into

to pay particular attention to; carefully selected for quality; tastefully chosen

to investigate; to delve; to probe; to enquire into; to look into