Which of the following is the best title for tile passage

A．How to Synthesize Fragrances

B．Synthetic Substances Are Easy to Make

C．Natural Flavorings and Fragrances

D．Synthetic Flavors and Fragrances

槟榔的主治病证是

A．多种肠道寄生虫证

B．食积气滞，腹胀便秘

C．血热妄行之吐血衄血

D．水肿胀满，脚气浮肿

E．风热感冒，温病斑疹