中国古代科学技术长期处于世界领先地位．研究明代农业和手工业的生产技术可以查阅（ ）
A：《伤寒杂病论》
B：《齐民要术》
C：《天工开物》
D：《本草纲目》
—It is raining hard, _______the farmers are still working in the field. —So they are.
— So many problems! I'm too tired.
— You should try ________ them by yourself.
