My question is whether to use a colon, comma, or dash after salutation.

Punctuation: Commas are used in non-defining adjective clauses.

标点: 非 定义形容词子句使用逗点.

When Sue was little she picked on her younger sister quite a bit.

休小时候总爱逗弄她的小妹妹.

He delights in teasing his young sister.

他以逗弄他的小妹妹为乐.

That little boy delights to tease cats.

那个小男孩喜欢逗弄猫.

He took the teasing in good part.

他认为逗弄他并无恶意.

She was teasing the cat.

她在逗弄那只猫.

Don't take what she said seriously she was only teasing.

别拿她的话当真--她不过是逗弄人.

The sweep of his arm took in most of Main Street.

他手臂划了一圈,(逗号)包括了主大街的大部分. (句号)

Within the comma's below are to be extracted from the file.

在逗号的下面是从文件中提取.

Comma,'', or a valid expression continuation expected.

应为逗号 、 “ ) ” 或有效的表达式继续符.

It cannot contain any, blank space or comma between digits.

它不可以有空格或逗号在数字当中.

But the same could be said -- could it not? -- of the humble comma.

不过这话用在小小的逗号上, 何尝不是如此?

He gave her a suggestive glance, and she blushed.

他用挑逗的目光看了她一眼, 羞得她满脸通红.

The actor made everyone laugh by taking off the members of the royal family.

这个演员模拟王室成员的形象,逗引人人发笑.

Ice forms at 0'c.

摄氏零度时结冰.

Frozen rabbit meat stuffed, wei xian tender, nutrient-rich, up to 80-90 % digestibility, popular consumers.

塞上冻兔肉, 味鲜肉嫩, 营养丰富, 消化率高达80 ― 90%, 颇受消费者青睐.

The river is frozen.

河上冻冰了.

The clothes were frozen on the washing-line.

衣服在晾衣绳上冻住了.

They try their best to leave nothing to chance.

他们尽最大努力不留漏洞.

With their forty silver bases, two bases for every board.

26和带卯的银座四十个, 这板底下有两卯、那板底下也有两卯.