effective的介詞搭配

effective at，例如：

1、But compared with other sedentary activities， like knitting， viewing TV may be especially effective at promoting unhealthy habits.不過，與其他久坐不動的行為比起來，比如織毛衣，看電視可能在促成不健康的習慣方面尤其有效。

2、This drug is very effective at the initial stage.這種藥在初期很有效。

3、Research has also suggested that it can also make us more effective at our jobs.研究還指出，休息能讓我們工作更高效。