In documents filed with the US markets regulator, Apple said the policy was "in the interests of security and efficiency".
在提交给美国市场监管机构的文件中，苹果表示，该政策“符合安全和效率”原则。
Apple reported that Mr Cook’s personal travel expenses came to $93,109 in 2017.
苹果公司称，2017年，库克先生的个人差旅费用达到93109美元。
His personal security expenses came to $224,216, the tech giant added.
这位科技巨头自己补充说，他的个人安全费用达到了224216美元。
In 2017, the chief executive’s salary was just over $3m. He also received $9.3m in bonuses, plus $89m of shares that were promised to him if he met certain targets.
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