How do you say

It's fine and pleasant to take a walk in Beijing today.

..in Chinese?

今天北京天气晴朗,适宜出门散步。

jīn tiān běi jīng tiān qì qíng lǎng , shì yí chū mén sàn bù 。

How do you say "He intends to start a healthier diet in three months." in Chinese?