根据短文内容和首字母的提示，把所缺单词填写在短文后面的横线上。

     Many students often 1. c______  about school. They might feel they have too 2. m_______ work to

do sometimes, or think the rules are too 3. s_______. We must learn how to change these "problems" into

"challenges". Education is an important part of our 4. d_______. As young adults, it is our 5. d_______ to

try our best to deal with each challenge in our education with the 6. h_______ of our teachers.

1._______ 2._______ 3._______ 4._______ 5.________ 6._______

筛窦炎头痛的特点是（）

A.前额及颞部头痛

B.头痛局限在内眦或鼻根部

C.前额部呈周期性、定时性头痛

D.头顶部、后枕部头痛，反射到颈部和眼球后

E.头顶及乳突部