下列哪项与夏季热的发病无关：

A．感受暑湿疫毒
B．发育营养较差
C．病后失调气阴不足
D．入夏之后，暑热亢盛
E．小儿不耐暑热熏蒸

A. It is not enough to learn a foreign language for three years.
B. It requires time and effort to master a foreign language.
C. A child can learn a foreign language better if her mother is around.
D. A child can learn a foreign language faster than an adult.