1、密切注视
... worthwhile adj.值得做的，值得出力的 keep a close watch on密切注视，密切关注 demand for需求 ...
2、密切注意
...keep an eye out for sb./sth.留心或注意某人/物keep a close watch on密切注意keep away from避开，离开；keep back防止，隐瞒 ...
3、紧盯着
... Keep close watch on 密切注视 keep a close watch on 密切注意 ; 紧盯着 keep watch on the suspects 监视作案嫌疑分子 ...
4、密切关注
...worthwhile adj.值得做的，值得出力的keep a close watch on密切注视，密切关注demand for需求 ...