a result前面用什么介词

前面用介词as，例如：

1、As a result， "Black" people are thought of as less competent and as having colder personalities.因此，人们认为“黑人”能力低下，性格冷淡。

2、As a result， businesses are much more accountable， often in very specific ways， which creates powerful incentives to improve service.因此，企业更加负责了，而且往往采取非常具体的措施，这就产生了改善服务的强大动力。