无微不至

無微不至
wúwēibùzhì
in every possible way (idiom); meticulous

CEDICT

Entry Composition

1 无 wú
  1. not to have
  2. no
  3. none
  4. not
  5. to lack
  6. un-
  7. -less
2 微 wēi
  1. tiny
  2. miniature
  3. slightly
  4. profound
  5. abtruse
  6. to decline
  7. one millionth part of
  8. micro-
  9. Taiwan pr. wéi
3 不 bù
  1. no; not so
  2. (bound form) not; un-
4 至 zhì
  1. to arrive
  2. most
  3. to
  4. until