News at Seven-Thirty highlights:Heavy fog shrouded Hong Kong;New measures are useful in against drink-driving;HK Airport January cargo volume drops;Obama will sign the newly passed economic stimulus package on Tuesday;Referendum to end term limits Began in Venezuela;head of National Palace Museum Visits Beijing ;thousands people visited ICAC’s new headquarters;University Students and Civic Party took a march;Hu Jintao arrived Tanzania;volunteers provide better housing for Sichuan;stamps honor the best horses of HK will be given free.