在开始出现症状1小时内进行治疗最为有效。
Treatment is most effective when started within 1 hour of the beginning of symptoms.
这一般是在开开始症状之后2- 4天出现。
This normally appears about two to four days after the first symptoms.
另外，一些平时不太容易过敏的女性，也开始出现了敏感的症状。
In addition, some don't usually too sensitive, women began to appear sensitive symptoms.
一旦症状开始出现，永久的视力损害已经发生。
Once symptoms begin to appear, permanent vision loss may have already occurred.
一旦症状开始出现，永久的视力损害已经发生。
Once symptoms begin to appear, permanent vision loss may have already occurred.
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