If you doubt your ability to use it, seek further advice.
如果你怀疑自己使用它的能力，可以寻求更多的建议。
Further, many people experiencing minor symptoms, who didn't seek medical treatment or advice from a poison control center, would not have been captured by the system.
还有一些人由于症状轻微而没有去就医或者向中毒中心寻求帮助，因此也就没有被记录。
As for how long in advance, it is best to seek further medical advice about it.
至于提前多长时间，最好还去征求一下医生的意见吧。
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