The two months recently spent on an advanced management programme at Harvard Business School, consorting with chief executives, has obviously rubbed off on Lewis, who is fizzing with energy.

• 最近两个月，他在哈佛商学院学习一个先进的管理课程，结交多位首席执行官，这些显然对精力充沛的刘易斯产生了不小的影响。