Three children in every classroom have a diagnosable mental health condition. Half of these are behavioural disorders, while one third are emotional disorders such as stress, anxiety and depression, which often become outwardly apparent through self-harm. There was an astonishing 52 per cent jump in hospital admissions for children and young people who had harmed themselves between 2009 and 2015.    

    Schools and teachers have consistently reported the scale of the problem since 2009. Last year, over half of teachers reported that more of their pupils experience mental health problems than in the past. But teachers also consistently report how ill-equipped they feel to meet pupils’ mental health needs, and often cite a lack of training, expertise and support from the National Health Services (英国国家医疗服务体系).

    Part of the reason for the increased pressure on schools is that there are now fewer ‘early intervention (干预)’ and low-level mental health services based in the community. Cuts to local authority budgets since 2010 have resulted in a significant decline of these services, despite strong evidence of their effectiveness in preventing crises further down the line. 

    The only way to break the pressures on both mental health services and schools is to reinvest in early intervention services inside schools.

    There are strong arguments for why schools are best placed to provide mental health services. Schools see young people more than any other service, which gives them a unique ability to get to hard-to-reach children and young people and build meaningful relationships with them over time. Recent studies have shown that children and young people largely prefer to see a counsellor in school rather than in an outside environment. Young people have reported that for low-level conditions such as stress and anxiety, a clinical setting can sometimes be daunting (令人却步的).

    There are already examples of innovative schools which combine mental health and wellbeing provision with a strong academic curriculum. This will, though, require a huge cultural shift. Politicians, policymakers, commissioners and school leaders must be brave enough to make the leap towards reimagining schools as providers of health as well as education services.

解析：B。根据题干中的mental health services be placed可定位至第五段第一句。该句指出，有很多强有力的论据可以证明为什么学校是提供心理健康服务的最佳场所，后文接着列举出具体原因。总结可知心理健康服务发挥作用的最佳场所是学校，选B。

错项排除：文中没有提到家庭，故A项排除。文章第五段最后提到了clinical setting，但说的是临床环境会让想要咨询的学生望而却步，并不是说医院是提供心理健康服务的最佳场所，C项与原文相悖，故排除。文章中多次提到社区的心理健康服务，主要是说社区的早期干预和心理健康服务对于预防未来危机是有效的，并不等同于社区是最适合提供心理健康服务的场所，故D项排除。