阅读下面这首唐诗，回答问题。
留别王维①
孟浩然
寂寂竟何待，朝朝空自归。
欲寻芳草去，惜与故人违②。
当路谁相假③？知音世所稀。
只应守寂寞，还掩故园扉。
[注] ①据《旧唐书·文苑传》载，孟浩然“年四十，来游京师，应进士不第，还襄阳”。这首诗便是临行前留给王维的。②违：分离。③假：提携。
小题1:诗中“当路谁相假？知音世所稀”两句，描写了诗人怎样的处境？表达了怎样的思想感情？(4分)
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小题2:清人沈德潜评价孟诗“语淡而味终不薄”(《唐诗别裁》)，请结合诗歌颔联作简要分析。(3分)
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