要在ASP (Active Server Pages) 中使用正则表达式提取HTML内容中所有图片的src属性，并基于提取的路径统一生成一篇包含标题、关键词、描述和正文（约1000字）的文章，可以分步进行：

步骤 1: 提取图片的src属性

首先，你需要一个函数来从HTML中提取所有图片的src属性。这可以通过正则表达式实现。

```asp
Function ExtractImageSrcs(htmlContent)
Dim regEx, Match, Matches
Set regEx = New RegExp
regEx.Pattern = "<img\s+[^>]src=""(.?)""[^>]*>"
regEx.Global = True
regEx.IgnoreCase = True
regEx.MultiLine = True
Set Matches = regEx.Execute(htmlContent)

Dim imgSrcs, i
ReDim imgSrcs(Matches.Count - 1)
For i = 0 To Matches.Count - 1
    Set Match = Matches(i)
    imgSrcs(i) = Match.SubMatches(0)
Next
ExtractImageSrcs = imgSrcs

End Function
```

步骤 2: 生成文章结构与内容

接下来，利用提取的src属性值来构造文章内容。我们假设这些图片将用于描述一段虚构的旅游故事。

```asp
Sub GenerateArticle()
Dim htmlContent, imgSrcs, i, articleText
htmlContent = "

This is a sample HTML content...

Some more text...

' 创建文章标题、关键词和描述（这里仅为示例）
Dim title, keywords, description
title = "Exploring the Enchanting Town"  ' 标题示例
keywords = "town, adventure, picturesque"  ' 关键词示例
description = "A thrilling journey through a quaint town with picturesque views and a rich history."  ' 描述示例

' 构造正文内容，每个图片对应一段描述（这里仅用5个例子，实际可以扩展）
articleText = "In the town's heart lies a charming little square surrounded by old-world buildings. The image below captures the essence of this peaceful haven." & vbCrLf & vbCrLf & _
              "Continuing on the outskirts of the town, we found a stunning view overlooking the valley. Check out the second image for a glimpse of this breathtaking scenery." & vbCrLf & vbCrLf & _
              "The evening brought with it a peaceful atmosphere and a serene reflection of the town's lights on the still waters of the nearby lake. See image 3 for a glimpse of this serenity." & vbCrLf & vbCrLf & _
              "Lastly, we couldn't miss out on the delicious food in the local market. The fourth image showcases some of the local delicacies that we couldn't resist trying." & vbCrLf & vbCrLf & _
              "In summary, our journey through this enchanting town was filled with adventures and beautiful sights that will surely be remembered for a long time."  ' 实际可以扩充至约1000字的内容，并可调整以匹配真实提取的图片数量和内容。

' 输出文章Markdown格式内容（含标题、关键词、描述和正文）
Response.Write "## " & title & vbCrLf & _
               "### Keywords: " & keywords & vbCrLf & _
               "### Description: " & description & vbCrLf & _
               articleText & vbCrLf & _
               "### Images (Click to view):" & vbCrLf & _
               Join(imgSrcs, vbCrLf)  ' 在实际中可以增加对图片的链接或引用，此处仅列出图片路径作为示例。