While methemoglobinemia clears spontaneously over several hours, hemolytic anemia may take several weeks to resolve.

高铁红会在几个小时后自动消失，而溶性贫需要几个期才能解除。

It is well known that the nitrate and nitrite from environment is causally related to infant methemoglobinemia and esophageal cancer.

环境中的硝酸盐暴露与婴儿高铁红及食管癌的病因关联已为人们熟悉。