性格决定命运，真相显露无疑。青青草综合

　　Michael Mosley explores the latest science about how our personalities are created - and whether they can be changed. 　　Despite appearances, Mosley is a pessimist who constantly frets about the future. He wants to worry less and become more of an optimist. 　　He tries out two techniques to change this aspect of his personality - with surprising results. 　　And he travels to the frontie... (展开全部)