The user wants translation to Japanese, preserving HTML tags exactly, only translate visible text content. Must output only the translation, nothing else. We need to translate each text node, keep tags, attributes unchanged. Also meta tags are present with charset attribute; they have visible text? The is a tag, not visible. It appears inside paragraph; but we shouldn't translate that tag. Keep as is. Also links text "Web MD" should be translated? It's visible text, likely keep same? "Web MD" is a brand; maybe keep as is. Usually we keep brand names unchanged. But we could translate "Web MD" to "Web MD". Keep as is. Also strong/em tags etc. We must ensure to preserve HTML exactly, just replace text. Let's go through:

Delirium Tremens (DT) or Alcohol Withdrawal Delirium (AWD) is a severe and life-threatening form ...

Translate Japanese: "Delirium Tremens (DT)またはアルコール離脱譫妄 (AWD) は、重篤で命に関わるアルコール離脱の形態です。症状には視覚・聴覚